Bug 12903: Integrate obfs4proxy into Tor Browser.

We start shipping obfs4proxy in Tor Browser nightlies and the alpha
series.
Bug 12903: Integrate obfs4proxy into Tor Browser.

We start shipping obfs4proxy in Tor Browser nightlies and the alpha
series.
Bump TBB version.
64 bit build on Mac for all components. Tor-Browser requires an additional patch, and versions.alpa was not updated to point at the correct tag
Merge remote-tracking branch 'gk/bug_12903_squashed_v3'
Update versions file for 4.5-alpha.
Switch nightlies and alpha to new Tor Browser branch.
Bug 8405: Add Tor patch for domain isolation.

Also clean up our patch application.
Remove old patches.
Merge remote-tracking branch 'tjr/tjr-64bit'

Conflicts:
	gitian/descriptors/mac/gitian-pluggable-transports.yml
Bump obfs4 related tags/commits for 4.5-alpha.
Merge remote-tracking branch 'origin/master'
Bug #13443: Update mingw-w64 for DirectShow com ptr fix.
Bump tor version to 0.2.6.1 in the alpha series.
Fix Expert Bundle filename+version.
Update changelog for 4.5-alpha-1
Bump Torbutton version.
Add correct obfs4 tag.
Bump TBB version for #3455 fixup.
Bump to build3 for 64bit osx fixes.