Issue #151 bootstrap 3 0

Added Bootstrap 3.0 files (js + css + fonts); updates: search field to match 3.0 markup in JS, LESS template, HTML examples.

Only show the filter if the number of options exceeds a set minimum.

Updated license: dual licensed with Apache 2 and BSD 3-Clause. Fixed issues with doubling "select all" options by using rebuild. Added buttonTitle option, see #138.

Allow setting the none-selected and n-selected display text in the default buttonText function

Move style that makes 'select all' item bold into common CSS (v2)

fix escape problem

Fixed invoking onChange in select/deselect

Preventing generated inputs from firing change input.

A small fix to a dropdown.

Option added for preventing generated inputs (radio or checkboxes) from firing change event (in my case that was unnecessary, change event on select was enough)

Option added for preventing generated inputs (radio or checkboxes) from firing change event (in my case that was unnecessary, change event on select was enough)

Moved CSS declarations into separate LESS file. Filter will now be
rebuild, too.

Remove trailing comma so that it can be minified with closure compiler

case insensitive filtering.

Fix border-radius for left side of multiselect.

Remove focus selection from input after user's click on it.

'onChange' event handler is not invoked when 'select' API is used.

Until now if multiselect itself is single element, it's 'button' loses part of styling. This happened due to wrong order of elements in parent container.

Updated readme for the new filterBehavior option.

Altered filtering behavior.

Filtering can be now done on option lables or values or both.
Configurable via: 'filterBehavior' option
Possible values are:
* 'text' (default) - uses only label text for filtering
* 'value' - uses only option value for filtering
* 'both' - uses label text and option value

See #92.

Fixed #82. Added beta js and demo html. The "new" multiselect will be more structured but hopefully offering the same possibilities with better performance.