Added option for a gesture completion callback block
Added the GestureRecognizer to the callback block
Merge pull request #20 from mutualmobile/pan_callback_block

Support for a callback block when a gesture event is completed.
Replace initializing code into initWithNibName:bundle:. Move gesture recognizers setup in viewDidLoad
Small formatting update
Removed documentation about the designated initializer
Updated changelog
Added 0.2.0 to readme and podspec
Updated release date in changelog
Added badge to readme
Merge remote-tracking branch 'upstream/master'