Add Gesture module.

[TIMOB-8582]
Implement Gesture "orientationchange" event.

[TIMOB-8582]
Define Ti orientation constants and implement conversion.

We need to convert from BlackBerry orientation constants to our Titanium constants.
Implemented a class for defining the Titanium constant values and
providing methods for conversion to and from BlackBerry.

[TIMOB-8582]
Implement Gesture.orientation property.

[TIMOB-8582]
Implement the Gesture "shake" event.

[TIMOB-8582]
Only enable sensor for "shake" when listeners added.

[TIMOB-8582]
Merge pull request #30 from joshthecoder/TIMOB-8582

[TIMOB-8582] Implement Ti.Gesture module.