Support scroll on terminal

Use [jquery-mousewheel](https://github.com/brandonaaron/jquery-mousewheel) version 3.1.12.
Merge pull request #1 from eitoball/support_scroll

Support scroll on terminal

Patch by Eito Katagiri. Thanks!!!
Add JavaScript style configuration for Emacs
Untabify
Use 2 spaces for an indent
Use " (double quote) for string literal
Update gems

    % bundle update
Add missing receiver
Remove a done TODO item!
Add a new TODO item

Support copy & paste on OS X.