Added Autodesk Maya MEL
Fixed MEL Syntax Highlighter

Fixed grouping errors. Added mel.mel file to test.
Improved D Language mode
Removed unused code; Added missing keywords; Added defaultToken
Refactor ScrollBarV and ScrollBarH classes
Move setVisible() method to ScrollBar class
Rename ScrollBarV -> VScrollBar, ScrollBarH -> HScrollBar
Changed mel.mel example file.
Updated project.
Added c-style behavior and fold mode / updated mode syntax.

As per Harutyun Amirjanyan's request I made the following two changes:
1) Added c-style behavior and fold mode.
2) Updated mode syntax for mel to current one used by Ace.
Merge pull request #1719 from nbreslow/master

Added support for Autodesk Maya MEL
Add forgotten css overflow:scroll to scrollbars
Merge pull request #1696 from danyaPostfactum/refactor/scrollbar

Refactor ScrollBarV and ScrollBarH classes
Merge pull request #1694 from robik/d-lang-support

Improved D Language mode