New Option:  liveSearchThreshold

Provides the ability to set a threshold on when the live search is available.
Add font-awesome CDN.
Add removable options.
Add support for when input has "multiple" as true.
Add compressed javascript
Update test.html
Ensure "x" is removed when selections are manually cleared and multiple is true.
update compressed version.
Remove liveSearchThreshold from this branch.
Up down navigation fix.
Merge remote-tracking branch 'origin/add-removeable'

Conflicts:
	bootstrap-select.min.js