cleanup and some specs.
fixes a memory leak from Mercury.on.
minor adjustments etc.
<wip> removes some files that aren't needed yet.
updates the fonts (to include a different character icon)
adjusts how classes provide their defaults -- using constructor.property for fallbacks so subclasses can override easier.
adjusts how views/regions refer to their elements by adding $ to any element (eg. @el = raw el, @$el = jquery)
adds the concept of plugins -- wip for now.
adds plugin specs and makes a few adjustments to modal.