Overriding receive and remove callback functions

Instead of having a trigger in the _create function I am overriding the callback functions.  This means the plugin will still work even if the listener for the receive or remove triggers gets removed.

- Also increased the size of the multiselects in the demo so it is easier to tell that they are being changed
Commented new code
Corrected misspellings of "receive"
Merge branch 'feature/notrigger' into develop
Changed some formatting in the demo
Increased the height of the selects to 160px
Added _stop

Added the _stop method and am overriding the stop callback.  This allows the sortable element to update the locations of it's items when they are moved inside the element as opposed to being dragged to a different element.
Corrected _stop documentation
Added "selectstop" event to the API documentation
Merge branch 'feature/stop' into develop
Updated the version number
Merge branch 'release/0.2'