Custom Effects + Improvements

Transition “out” effects don’t reset opacity to 1. This is the only
default behavior change that has been made to the UI pack. Shouldn’t
affect the vast majority of use cases.

Performance improvements due to automatically forcefeeding all reset
values.

Fix reset timing bug in which reset occurs after user’s complete
callback fires. Closes #132. Closes #129.

Turned sequence registration into externally-accessible function.
Closes #94. Closes #136. Added options customizability to calls.

See http://VelocityJS.org/#uiPack.