Extension for bootstrap modal

I created an extension for the twitter bootstrap modal, there are two new functions added to a modal to lock and unlock the modal.

To lock : `$('#myModal').modal('lock');`
To unlock : `$('#myModal').modal('unlock');`

Added the extension to oae.bootstrap.js with the name 'bootstrap.modal' so you specify it
on top of the JavaScript file of widget

Added the styling to oae.components.css