Bump versions and update changelog for 4.0a3.
Update changelog for 3.6.6, and add an omission to 4.0a3.
Update subkeys for Mike Perry.
Remove Torbutton 1.6.12.3 from 3.6.6 changelog.
Revert "Remove Torbutton 1.6.12.3 from 3.6.6 changelog."

This reverts commit 12f43a2f34f5341b66ae259bf26c78d7a8d89544.

Ah, screw it. Let's keep it! What could possibly go wrong!
Use SHA for Torlauncher due to gpg+git tag timestamp braindamage.
Also update the tag verification for Tor Launcher..
Also switch gitian to commit hash.
Use the commit for Tor Launcher as well.
Bug 13245: Prevent non-english TBBs from upgrading to english version.
Update changelog for 4.0a3 (and fix 3.6.6 changelog for history).
Add the update responses script

Add the update responses script in directory tools/update-responses.

This adds the content of commit 2c3625507a5c12b4c15b6681a8b694114a0cfb7b
from https://github.com/boklm/tb-update-response.
Point nightlies at FF31ESR.
Bug #12873: Re-enable TLSv1.1 and v1.2 for Meek.
Bug 12462: Enable HTTPSHandler in Python.
Bug 12798: Add pulseaudio development headers.
Bug 12461: New compiler for Tor Browser ESR 31.

Tor Browser based on Firefox ESR 31 needs a newer compiler. GCC 4.4 is
not supported anymore. We chose the latest GCC (4.9.1) as we don't want
to bump the version again when we start deploying hardened builds.
Bug 11189: Adding BUILD_HOSTNAME.
Bug 12811: Bumping mingw-w64 commit.

Tag 3.1.0 is too old for building Firefox ESR 31.
mbsdiff is not linked as mbsdiff.exe anymore.

This got fixed by https://bugzilla.mozilla.org/show_bug.cgi?id=933120.