Re-pin version numbers for stable branch.
Update Yahoo! Mail Exchanger (MX) pattern.
Merge branch 'master' into stable
Pulled in master and bumped version.
Version bump.
Reverting Multidict to Paste and version bump.
Version bump for dnsq and expiringdict which are correctly licensed.
Updated manifest to include LICENSE file and verison number bump.
Version bump and manifest fix.
Relax some dependencies
Squashed commit of the following:

commit 5543c5ec64841ebbc48ac443c983a824f20bec9f
Author: Sergey Obukhov <sergey.obykhov@mailgunhq.com>
Date:   Tue Mar 11 11:57:40 2014 -0700

    fix base64 encoding
Fix (and test coverage) for base64 encoding issue.