Add Debian to Install Guide title on docs.o.o

Update title of book for trunk and havana versions.

Please wait with approval until the changes for Debian have been
approved for both master and havana branches.

Change-Id: Id5c3a0fc62d2c06b427bc3a6753acec366a8796e
Install Guide: Remove extra ')' from Compute intro

Change-Id: Ib510ce4719dcac26438372438bdc4517b1c5a143
backport: havana
Merge "Install Guide: Remove extra ')' from Compute intro"
Merge "Add Debian to Install Guide title on docs.o.o"