:gb: Normalised spelling of behaviour.
:gb: Updated Copyright year to 2014.
:gb: Added bower.json.
:gb: Updated bower.json.
:gb: Updated scripts to use strict mode.
:gb: Refined README.
:gb: Refactored build to use gulp.
:gb: Added relativeInput and clipRelativeInput functionality. Created `relative.html` example to demonstrate new features.
:gb: Fixed type bug in onMouseMove.
:gb: Resolved #38.
:gb: Refactored motion calculations to use px and added interactive.html.
:gb: Fixed motion calculation.
:gb: Updated README.
:gb: Added origin control to the behaviours.
:gb: Added origin method to the API and updated README.
:gb: Refactored out layer parsing to updateLayers method.
:gb: Updated README.
:gb: Updated LICENSE.
:gb: Updated Twitter handle.
:gb: Updated Twitter handle.