Add a placeholder using data-placeholder attribute so we don't need to create an entire function if we want to add placeholders to multiple multiselects.

Set to enabled on rebuild when options is not empty and disableIfEmpty is true.

Added option for #466 - although this may be handled easier by directly modifying the buttonText option!

Added the AMD header for use with require.js module definitions

Change dataprovider tags variable into an array.

Created an inheritClasses option (default: false) that pulls classes (documentation still to be done).

Update bootstrap-multiselect.js, To solve the search issue when using optgroup

** Fixed regression on setOptions (#444) **

** Fix for #427 **

** fix for #430 **

** Fix for #429 and #434 **

Improved knockout binding.

Shift + Click range selection improvements. Fixes #431.

** Moved the default caret under the drop-down button text to accommodate with fixed-width restrictions **