Merge pull request #54 from caseyjhol/master

Fix Issue #51
Merge pull request #55 from caseyjhol/master

Fix #34
Merge pull request #56 from caseyjhol/master

Include #53 option class code
Merge pull request #57 from caseyjhol/master

Update min files
Merge pull request #62 from caseyjhol/master

Fix #61
Merge pull request #63 from caseyjhol/master

Fix option class
Merge pull request #64 from caseyjhol/master

Fix #50 and add #60 (disabled options)
Update README.md
Update README.md
Update README.md
Merge pull request #67 from caseyjhol/master

Fix #65. Update divider styles and include data-divider from #48
Merge pull request #70 from caseyjhol/master

Fix accessibility
Merge pull request #71 from caseyjhol/master

Add preventDefault for disabled options
Change example page link
Merge pull request #73 from caseyjhol/master

Fix #72. Add data-subtext (#48) & support for disabled optgroups
Added optional tick icon on selected options, added multi select support, added optional title to shown when nothing is selected, added 'val' method to update the plugin and auto re render, and added 'render' method to enable user to force a redraw
Added a notSelectedText property to handle cases with a multiselect, which has no title, and the user de-selects all items
Added return value if you exeute a method on the plugin that returns a value, or retireve a property.  Else we return the jquery object for chainability
Fixed layout issue with tick overlapping text, moved drop arrow to the left as it looks better
Merged master back into this branch, fixed issue where disabled items were still clickable