docs: Adding installation instructions and configuration tips

README.md and INSTALL.md now redirect to documentation in docs/ folder.
Later we will add links to HTML pages with NFD documentation.

Change-Id: I4f02f3166e7802570b24ed225ac4de8c56c6e64e
Refs: #1446
diff --git a/docs/manpages.rst b/docs/manpages.rst
index ff5630a..9690f11 100644
--- a/docs/manpages.rst
+++ b/docs/manpages.rst
@@ -6,3 +6,4 @@
    manpages/nrd
    manpages/ndn-autoconfig
    manpages/ndn-autoconfig-server
+   :maxdepth: 1