docs: remove links to inexistent tarballs

Change-Id: I541aff8597f815124f7277eb24944da2fceffe9e
diff --git a/docs/releases.rst b/docs/releases.rst
index 9e9da64..54523c1 100644
--- a/docs/releases.rst
+++ b/docs/releases.rst
@@ -1,5 +1,5 @@
-All NLSR Releases
-=================
+Release History
+===============
 
 .. toctree::
    :glob:
@@ -10,97 +10,74 @@
    release-notes/*
 
 * **NLSR version 0.7.0**
-  (:doc:`Release Notes <release-notes/release-notes-0.7.0>`, `Documentation <https://docs.named-data.net/NLSR/0.7.0/>`__)
-
-  `src (git) <https://github.com/named-data/NLSR/releases/tag/NLSR-0.7.0>`__,
-  `src (tarball) <https://named-data.net/downloads/nlsr-0.7.0.tar.xz>`__ (`checksum <https://named-data.net/downloads/nlsr-0.7.0.tar.xz.sha256>`__)
+  (:doc:`Release Notes <release-notes/release-notes-0.7.0>`,
+  `GitHub <https://github.com/named-data/NLSR/releases/tag/NLSR-0.7.0>`__,
+  `Documentation <https://docs.named-data.net/NLSR/0.7.0/>`__)
 
 * **NLSR version 0.6.0**
-  (:doc:`Release Notes <release-notes/release-notes-0.6.0>`, `Documentation <https://docs.named-data.net/NLSR/0.6.0/>`__)
-
-  `src (git) <https://github.com/named-data/NLSR/releases/tag/NLSR-0.6.0>`__,
-  `src (tarball) <https://named-data.net/downloads/nlsr-0.6.0.tar.bz2>`__ (`checksum <https://named-data.net/downloads/nlsr-0.6.0.tar.bz2.sha256>`__)
+  (:doc:`Release Notes <release-notes/release-notes-0.6.0>`,
+  `GitHub <https://github.com/named-data/NLSR/releases/tag/NLSR-0.6.0>`__,
+  `Documentation <https://docs.named-data.net/NLSR/0.6.0/>`__)
 
 * **NLSR version 0.5.2**
-  (:doc:`Release Notes <release-notes/release-notes-0.5.2>`, `Documentation <https://docs.named-data.net/NLSR/0.5.2/>`__)
-
-  `src (git) <https://github.com/named-data/NLSR/releases/tag/NLSR-0.5.2>`__,
-  `src (tarball) <https://named-data.net/downloads/nlsr-0.5.2.tar.bz2>`__ (`checksum <https://named-data.net/downloads/nlsr-0.5.2.tar.bz2.sha256>`__)
+  (:doc:`Release Notes <release-notes/release-notes-0.5.2>`,
+  `GitHub <https://github.com/named-data/NLSR/releases/tag/NLSR-0.5.2>`__,
+  `Documentation <https://docs.named-data.net/NLSR/0.5.2/>`__)
 
 * **NLSR version 0.5.1**
-  (:doc:`Release Notes <release-notes/release-notes-0.5.1>`, `Documentation <https://docs.named-data.net/NLSR/0.5.1/>`__)
-
-  `src (git) <https://github.com/named-data/NLSR/releases/tag/NLSR-0.5.1>`__,
-  `src (tarball) <https://named-data.net/downloads/nlsr-0.5.1.tar.bz2>`__ (`checksum <https://named-data.net/downloads/nlsr-0.5.1.tar.bz2.sha256>`__)
+  (:doc:`Release Notes <release-notes/release-notes-0.5.1>`,
+  `GitHub <https://github.com/named-data/NLSR/releases/tag/NLSR-0.5.1>`__,
+  `Documentation <https://docs.named-data.net/NLSR/0.5.1/>`__)
 
 * **NLSR version 0.5.0**
-  (:doc:`Release Notes <release-notes/release-notes-0.5.0>`, `Documentation <https://docs.named-data.net/NLSR/0.5.0/>`__)
-
-  `src (git) <https://github.com/named-data/NLSR/releases/tag/NLSR-0.5.0>`__,
-  `src (tarball) <https://named-data.net/downloads/nlsr-0.5.0.tar.bz2>`__ (`checksum <https://named-data.net/downloads/nlsr-0.5.0.tar.bz2.sha256>`__)
+  (:doc:`Release Notes <release-notes/release-notes-0.5.0>`,
+  `GitHub <https://github.com/named-data/NLSR/releases/tag/NLSR-0.5.0>`__,
+  `Documentation <https://docs.named-data.net/NLSR/0.5.0/>`__)
 
 * **NLSR version 0.4.3**
-  (:doc:`Release Notes <release-notes/release-notes-0.4.3>`, `Documentation <https://docs.named-data.net/NLSR/0.4.3/>`__)
-
-  `src (git) <https://github.com/named-data/NLSR/releases/tag/NLSR-0.4.3>`__,
-  `src (tarball) <https://named-data.net/downloads/nlsr-0.4.3.tar.bz2>`__ (`checksum <https://named-data.net/downloads/nlsr-0.4.3.tar.bz2.sha256>`__)
+  (:doc:`Release Notes <release-notes/release-notes-0.4.3>`,
+  `GitHub <https://github.com/named-data/NLSR/releases/tag/NLSR-0.4.3>`__,
+  `Documentation <https://docs.named-data.net/NLSR/0.4.3/>`__)
 
 * **NLSR version 0.4.2**
-  (:doc:`Release Notes <release-notes/release-notes-0.4.2>`, `Documentation <https://docs.named-data.net/NLSR/0.4.2/>`__)
-
-  `src (git) <https://github.com/named-data/NLSR/releases/tag/NLSR-0.4.2>`__,
-  `src (tarball) <https://named-data.net/downloads/nlsr-0.4.2.tar.bz2>`__ (`checksum <https://named-data.net/downloads/nlsr-0.4.2.tar.bz2.sha256>`__)
+  (:doc:`Release Notes <release-notes/release-notes-0.4.2>`,
+  `GitHub <https://github.com/named-data/NLSR/releases/tag/NLSR-0.4.2>`__,
+  `Documentation <https://docs.named-data.net/NLSR/0.4.2/>`__)
 
 * **NLSR version 0.4.1**
-  (:doc:`Release Notes <release-notes/release-notes-0.4.1>`, `Documentation <https://docs.named-data.net/NLSR/0.4.1/>`__)
-
-  `src (git) <https://github.com/named-data/NLSR/releases/tag/NLSR-0.4.1>`__,
-  `src (tarball) <https://named-data.net/downloads/nlsr-0.4.1.tar.bz2>`__ (`checksum <https://named-data.net/downloads/nlsr-0.4.1.tar.bz2.sha256>`__)
+  (:doc:`Release Notes <release-notes/release-notes-0.4.1>`,
+  `GitHub <https://github.com/named-data/NLSR/releases/tag/NLSR-0.4.1>`__,
+  `Documentation <https://docs.named-data.net/NLSR/0.4.1/>`__)
 
 * **NLSR version 0.4.0**
-  (:doc:`Release Notes <release-notes/release-notes-0.4.0>`, `Documentation <https://docs.named-data.net/NLSR/0.4.0/>`__)
-
-  `src (git) <https://github.com/named-data/NLSR/releases/tag/NLSR-0.4.0>`__,
-  `src (tarball) <https://named-data.net/downloads/nlsr-0.4.0.tar.bz2>`__ (`checksum <https://named-data.net/downloads/nlsr-0.4.0.tar.bz2.sha256>`__)
+  (:doc:`Release Notes <release-notes/release-notes-0.4.0>`,
+  `GitHub <https://github.com/named-data/NLSR/releases/tag/NLSR-0.4.0>`__,
+  `Documentation <https://docs.named-data.net/NLSR/0.4.0/>`__)
 
 * **NLSR version 0.3.2**
-  (:doc:`Release Notes <release-notes/release-notes-0.3.2>`)
-
-  `src (git) <https://github.com/named-data/NLSR/releases/tag/NLSR-0.3.2>`__,
-  `src (tarball) <https://named-data.net/downloads/nlsr-0.3.2.tar.bz2>`__ (`checksum <https://named-data.net/downloads/nlsr-0.3.2.tar.bz2.sha256>`__)
+  (:doc:`Release Notes <release-notes/release-notes-0.3.2>`,
+  `GitHub <https://github.com/named-data/NLSR/releases/tag/NLSR-0.3.2>`__)
 
 * **NLSR version 0.3.1**
-  (:doc:`Release Notes <release-notes/release-notes-0.3.1>`)
-
-  `src (git) <https://github.com/named-data/NLSR/releases/tag/NLSR-0.3.1>`__,
-  `src (tarball) <https://named-data.net/downloads/nlsr-0.3.1.tar.bz2>`__ (`checksum <https://named-data.net/downloads/nlsr-0.3.1.tar.bz2.sha256>`__)
+  (:doc:`Release Notes <release-notes/release-notes-0.3.1>`,
+  `GitHub <https://github.com/named-data/NLSR/releases/tag/NLSR-0.3.1>`__)
 
 * **NLSR version 0.3.0**
-  (:doc:`Release Notes <release-notes/release-notes-0.3.0>`)
-
-  `src (git) <https://github.com/named-data/NLSR/releases/tag/NLSR-0.3.0>`__,
-  `src (tarball) <https://named-data.net/downloads/nlsr-0.3.0.tar.bz2>`__ (`checksum <https://named-data.net/downloads/nlsr-0.3.0.tar.bz2.sha256>`__)
+  (:doc:`Release Notes <release-notes/release-notes-0.3.0>`,
+  `GitHub <https://github.com/named-data/NLSR/releases/tag/NLSR-0.3.0>`__)
 
 * **NLSR version 0.2.2**
-  (:doc:`Release Notes <release-notes/release-notes-0.2.2>`)
-
-  `src (git) <https://github.com/named-data/NLSR/releases/tag/NLSR-0.2.2>`__,
-  `src (tarball) <https://named-data.net/downloads/nlsr-0.2.2.tar.bz2>`__ (`checksum <https://named-data.net/downloads/nlsr-0.2.2.tar.bz2.sha256>`__)
+  (:doc:`Release Notes <release-notes/release-notes-0.2.2>`,
+  `GitHub <https://github.com/named-data/NLSR/releases/tag/NLSR-0.2.2>`__)
 
 * **NLSR version 0.2.1**
-  (:doc:`Release Notes <release-notes/release-notes-0.2.1>`)
-
-  `src (git) <https://github.com/named-data/NLSR/releases/tag/NLSR-0.2.1>`__,
-  `src (tarball) <https://named-data.net/downloads/nlsr-0.2.1.tar.bz2>`__ (`checksum <https://named-data.net/downloads/nlsr-0.2.1.tar.bz2.sha256>`__)
+  (:doc:`Release Notes <release-notes/release-notes-0.2.1>`,
+  `GitHub <https://github.com/named-data/NLSR/releases/tag/NLSR-0.2.1>`__)
 
 * **NLSR version 0.2.0**
-  (:doc:`Release Notes <release-notes/release-notes-0.2.0>`)
-
-  `src (git) <https://github.com/named-data/NLSR/releases/tag/NLSR-0.2.0>`__,
-  `src (tarball) <https://named-data.net/downloads/nlsr-0.2.0.tar.bz2>`__ (`checksum <https://named-data.net/downloads/nlsr-0.2.0.tar.bz2.sha256>`__)
+  (:doc:`Release Notes <release-notes/release-notes-0.2.0>`,
+  `GitHub <https://github.com/named-data/NLSR/releases/tag/NLSR-0.2.0>`__)
 
 * **NLSR version 0.1.0**
-  (:doc:`Release Notes <release-notes/release-notes-0.1.0>`)
-
-  `src (git) <https://github.com/named-data/NLSR/releases/tag/NLSR-0.1.0>`__,
-  `src (tarball) <https://named-data.net/downloads/nlsr-0.1.0.tar.bz2>`__ (`checksum <https://named-data.net/downloads/nlsr-0.1.0.tar.bz2.sha256>`__)
+  (:doc:`Release Notes <release-notes/release-notes-0.1.0>`,
+  `GitHub <https://github.com/named-data/NLSR/releases/tag/NLSR-0.1.0>`__)