Release 0.6.7

Quick fix for 0.6.6.

Release 0.6.6

1. Add custom events
2. Support higher Node.js versions
3. Add useSelectionScroll option
4. Bug fixes

Release 0.6.5

1. Add shift+space support.
2. Bug fixes.

Release 0.6.4

1. Add null-check for instances.
2. Add 'stopPropgationOnClick' option.

Release 0.6.3

1. Improve toInt
2. Stop propagating click event through scrollbar rails.
3. IE touch device fix.
4. RTL support.
5. Other minor fixes.

Release 0.6.2

1. Reattach rails when removed.
2. Check if parentNode exists when DOM-removing.
3. Consume mousewheel event for hovered textarea.
4. Other minor fixes.

Release 0.6.1

1. jQuery adaptor error fix.

Release 0.6.0

It's a huge change! #277

1. Use Browserify to make the source tree modular.
2. Be independent from jQuery.
3. npm with browserify compatibility.
4. Separate a bower repo.
5. Bug Fixes.

Release 0.5.9

1. Change how `in-scrolling` works.
2. Bug fixes.

This is the last release of an old-styled version. In the next version,
it may change a lot. Please stay tuned!

Release 0.5.8

1. Improve mouse handler logic.
2. Add rail margin detection.
3. Add swipePropagation option.
4. Bug fixes.