GitHub Page to improve documentation/examples

[dimirc]

ui-select Github url:
http://angular-ui.github.io/ui-select/

branch:
https://github.com/angular-ui/ui-select/tree/gh-pages

Features that should be explained with an example:

• basic demo (single)
• basic demo (multiple)
• filtering (local choices)
• filtering (query external sources)
• bind to single property
• disable choices
• events (ex: onSelect, onRemove)

Issues related to missing documentation

Reference:
http://ivaynberg.github.io/select2/
http://brianreavis.github.io/selectize.js/

[amcdnl]

I think we got this covered in the wiki now. Any additions you think we need?