Added resizable module

#### uiResizable module
----------------------------------
It's a mini port of the [JQueryUI Resizable](http://jqueryui.com/resizable/) plugin.

I implemented: 
* the e,s,se handles
* the containment option
* the max/min width/height options
* some new options that are used to customize the CSS classes added by the directive

I haven't started writing the unit test yet. It took a lot longer than I expected writing the module that I run out of time. Will get back to it as soon as I can!

There is still room for new features so feel free to comment/suggest!