Comment fine-tuning to fix typos.
Refactored function positions and member variable initialization.
[Issue#1] Memory leak fixed.

Before fix, animator controller appended new transform string after every moment to the existing transform string. This resulted to a massive string when animation proceeded. Now, movement transformations replace existing movement substring in transformation by a new one. Then, unnecessary substrings are not appended into transformation.
Firefox related fix to make sure animation loop does not skip the first frame.

Element offset values may be float values in Firefox. Float value could be just outside of the expected integer range when controller compared values. Therefore, animation skipped first step after loop when Firefox was used.

Also, minor refactoring of the offset related functions.
Controller initialization function position changed.
Improvements for slider offset handling.
Mousewheel support for Firefox.

New jQuery-mousewheel plugin added as a thirdparty dependency and used in controller. Minified with other thirdparty libraries for commit.

Whole package grunted.
Slider offset improvement.
Release version 1.3.1