docs: Update source installation instructions and other additions

Change-Id: Ie4976f728e0f091d829ba05539eb27c2e328e496
Refs: #1728
diff --git a/docs/FAQ.rst b/docs/FAQ.rst
index 084e443..146cbdc 100644
--- a/docs/FAQ.rst
+++ b/docs/FAQ.rst
@@ -281,3 +281,24 @@
 For the list of available packages, refer to `NDN PPA repository`_ homepage.
 
 .. _NDN PPA repository: https://launchpad.net/~named-data/+archive/ppa
+
+
+.. _How to start using NDN Overlay on Gentoo Linux:
+
+How to start using NDN Overlay on Gentoo Linux?
+-----------------------------------------------
+
+If you want to install NFD and other packages using Portage on Gentoo Linux, you can start
+using NDN Overlay.
+
+Simply checkout `NDN Overlay <https://github.com/Pesa/ndn-overlay>`_ repository to some
+location add the checkout path to ``PORTDIR_OVERLAY`` in ``/etc/portage/make.conf``:
+
+::
+
+    cd /some/path
+    git clone https://github.com/Pesa/ndn-overlay.git
+
+    # and then add /some/path/ndn-overlay to PORTDIR_OVERLAY in /etc/portage/make.conf
+
+Afterwards, you will be able to install ``nfd`` using standard mechanisms.
diff --git a/docs/getting-started.rst b/docs/getting-started.rst
index 42e698a..57d0d57 100644
--- a/docs/getting-started.rst
+++ b/docs/getting-started.rst
@@ -18,7 +18,7 @@
 To install NFD from source:
 
 -  install ``ndn-cxx`` according to `ndn-cxx installation
-   instructions <http://named-data.net/doc/ndn-cxx/0.1.0/INSTALL.html>`__
+   instructions <http://named-data.net/doc/ndn-cxx/0.2.0/INSTALL.html>`__
 -  install ``NFD`` according to :doc:`these
    instructions <INSTALL>`
 
@@ -29,13 +29,13 @@
 
     git clone https://github.com/named-data/ndn-cxx
     cd ndn-cxx
-    git checkout ndn-cxx-0.1.0
+    git checkout ndn-cxx-0.2.0
     ...
     # continue with ndn-cxx installation instructions
 
-    git clone https://github.com/named-data/NFD
+    git clone --recursive https://github.com/named-data/NFD
     cd NFD
-    git checkout NFD-0.1.0
+    git checkout NFD-0.2.0
     ...
     # continue with NFD installation instructions
 
@@ -141,7 +141,7 @@
 Sample applications:
 
 -  `Simple examples in ndn-cxx
-   library <http://named-data.net/doc/ndn-cxx/0.1.0/examples.html>`__.
+   library <http://named-data.net/doc/ndn-cxx/0.2.0/examples.html>`__.
    If you have installed ndn-cxx from source, you already have compiled
    these: