[Tweener] Translating document into Japanese

[Ayu Tada]

Thanks to all of you for your kindness.
Below is url of my translating document.

http://www.tonpoo.com/tweener/index2.html

So far, I've roughly translated "Class methods and functions" and
"Reference". I'll keep working on it as much as possible, and hope I can
contribute to Tweener community.

Thanks,

Tonpoo