Remove upload pack ref filtering

Change-Id: I7ffcbf00e70eea68803eb6c046d5ddca55503b8b
Remove "show readme" flag in favor of automatic detection

Automatic detection also will now also display a plain text "readme"
or "readme.txt" file.

Change-Id: Id6be729bdc469e7a5cfd1f4144df340a6b93475e
Determine best commit id for the commit and use that in links

Change-Id: I2c0f5dbb479c06402645cbb92e4845eed29d6726
Support for intra-Markdown linking using [[WikiLinks]] syntax (issue-324)

All WikiLinks must be specified relative to the root of the repository.
The displayed link text is stripped to just the document name. Spaces in
the document name are replaced with '-' characters; this is consistent with
wiki syntax and Github.

Change-Id: Id3fb1b5441352d9bacc4993a5b85882db113693b
Remove emphasis coloring in markdown div

Change-Id: Ie81e94546868a4a16c302ed0b283ac86d3491276