Add jQuery Slider
Apply slider to control the number of circle elements on the page.
	- Add change hander to directive to handle changes to the number of circles
	- Add "pop" function to field widget
Concat all css into one file and minify it.
Make circles look like circles finally.
Adding momentum to collisions.
Adding random size.
Fixing bug in circle where could not set positions, velocities, or accelerations of 0,0.
Added a bullet scenario.
Adding a new checkbox which enables the user to choose whether they want the circles initialized with random size.
Updating README