SVN source steps mode=export support authentication. Fixes #2463
skip 'stop slave' test on windows

Windows does not have os.kill() function, which is used
in the tested code path. Skip the test for now.
Master side source checkout steps support retry option. Fixes #2465, #2357
Merge branch 'bug2463' of git://github.com/srinupiits/buildbot
Merge branch 'bug2465-sqash' of git://github.com/srinupiits/buildbot
Merge branch 'skip-slave-kill' of git://github.com/elmirjagudin/buildbot
SVN source step and Shell command support password obfuscation. Fixes #2468, #1478
Merge branch 'bug2468-squash' of git://github.com/srinupiits/buildbot
Gerrit integration with Git on master side
fix bootstrap at version 2.3.2
Merge branch 'bug2485-squash' of git://github.com/srinupiits/buildbot
fix pyflakes
Check git version for --branch support. Fixes #2504
Merge branch 'bug2504' of git://github.com/srinupiits/buildbot
Check git version for --branch support. Fixes #2504
Merge branch 'bug2504' of git://github.com/srinupiits/buildbot
fix error reporting in ClusteredService (patch by buck1)
actually include the changesource connectors
fix up TempSourceStamp.asDict so that TriggerStep can succeed
fix the github tests