Merge remote-tracking branch 'upstream/master'
Implement Message ID
Re-add IMAPMessagesRequestKindGmailMessageID
Cleanup
Merge pull request #140 from CodaFi/MsgID

Implemented Gmail MessageID extension. Fixed #13.
Merge remote-tracking branch 'upstream/master'
Updated to reflect dylib copy instructions
Merge pull request #143 from CodaFi/Update-Installation-Instructions

Update installation instructions for Mac OS X build, framework version.
Fixed crash when a method is scheduled twice to perform after delay. Fixed #149.
Fix for MCMessageBuilder copy constructor

Fix for HTML body being overwritten with text body.
Merge pull request #150 from thusfresh/MB_Copy_Const_Fix

Fix for MCMessageBuilder copy constructor.