README update (minor)
Refactor coin toss method into a typewar util library
Add box2d js and box2d crafty component
Init crafty box2d component in pro to battle scene

Note: might want to consider initializing this not
as part of the scene but as part of crafty's init
ignore non minified box2d
Add an arcing attack from the npc monster

uses box2d and attaches a physics model to the
text fragment.  Fire an initial impulse/force against
the text fragment to send it on it's way

to tweak the rate of travel of the physics fragment
we'll need to adjust the PTM_RATIO on box2d initialization
This sets the number of pixels per meter in physical
calculations