Documentation: Wrap lines in index.rst

Wrap lines at 80 characters where possible.

Change-Id: Ib254734a7a18b62f965577c368929058258b489f
Documentation: Add Sony to list of users

Change-Id: I0568f27562e5d12f7e5e528b216ca1b1e9cd8256
Merge pull request #2130 from dpursehouse/doc-index-updates

Doc index updates