bug 965803 -- add repo init and sync flags
Bug 982463 - Add dolphin support to B2G. r=mwu
Bug 935776: fix bootstrapping on Mac Mavericks

* don't prompt for gcc-4.6 and MacSDK10.6 on Mavericks
* prompt for gnu-tar if no compatible archiver is found
Merge pull request #332 from vicamo/bugzilla/935776/emulator-mac-mavericks

Bug 935776: fix bootstrapping on Mac Mavericks. r=marshall_law
Merge pull request #331 from Seinlin/bug-982463

Bug 982463 - Add dolphin support to B2G. r=mwu
Merge pull request #319 from jhford/repo_init_flags

bug 965803 -- add repo init and sync flags r=mwu