Added pinch and grab.
-FEATURE: Made it possible to set a minimum delay between two gestures
of different types.
-FEATURE: Added grab recognition and events.
-FEATURE: Added pinch recognition and events.
-OTHER: Added a changelog.
-CODE: Changed circlePerformed() to use a switch statement instead of
ifs.
-CODE: Changed the type of the keys in the processedTypes map to String
instead of State.