README files are not shown on the summary page by default

Change-Id: I421a6b8f8c8eaa5d34b7629858de76fc96458cd3
Eliminate the "enumerate documentation" repository setting

Change-Id: I3a7c13b4c626f8b5ea2a63717dfe4249c19eebb4
Display common repository documents as tabs on the docs page

Change-Id: I6935fa45598da847936748b474a3da47e94efaac
CSS tweaks

Change-Id: I568ffc2b7dfb59e8a6748aaf3e16993bb2016384