convert existing markdown documents to restructured text
Merge sa2ajj/buildbot:buildbot-uses-rst (PR #1222)
try www setup.py's twice, blowing away libs/ first
Mention new review process
Support specifying an identity file with GerritStatusPush

GerritChangeSource supports a knob for specifying a secret key to use
for connecting - make sure status push is symmetric.
Merge bshi/buildbot:gerrit-status-push (PR #1223)

+autopep8