This patch set makes the following changes:
* Add index file to each subdirectory of doc/source
* Update doc/source/index.rst with new links
* Move content of install-guide to the doc/source/install
* Minor changes
Depends-On: Ifc5512c0e2373cf3387e0e0498268eab092e52bb
Change-Id: Iecb4f60efb015a56b9b37331859848b287112842