unselectable text should have the default arrow cursor, not text cursor
Create the Crafty model component with core `attr` updates.
Fix viewport.pan docs
Merge pull request #724 from sbyrnes321/cursor

unselectable text should have the default arrow cursor, not text cursor, on mouse-over
Merge pull request #726 from starwed/pan-fix

Fix viewport.pan docs
Switch to defineProperty in all cases

Currently we use __defineGetter style syntax, but it has [been deprecated](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/defineGetter?redirectlocale=en-US&redirectslug=JavaScript%2FReference%2FGlobal_Objects%2FObject%2FdefineGetter).

This switches us to using defineProperty, which works in every browser we support.  (IE9+, any non-ancient version of Firefox, etc.)
Set enumerable properties

This sets it so that the "private" 2D properties (`._x`, `._h` and so on) are non-enumerable, while their associated setter/getters are.

Seems to work in Firefox/Chrome/Safari, haven't checked mobile, can't test it in IE.
if no color is assigned, the Color component should do nothing whatsoever
Merge pull request #730 from sbyrnes321/nocolor

if no color is assigned, the Color component should do nothing whatsoever
Round translation in canvas setTransform

The translation in setTransform should be rounded to the nearest pixel, since canvas implementations deal with fractional coordinates inconsistently.
Merge pull request #703 from blainesch/feature/model_core

Create the Crafty model component with core `attr` updates.
Merge pull request #725 from starwed/int-viewport

Round translation in canvas setTransform
Reorganize init/removal of DOM component

DOM wasn't really cleaning up after itself.  This moves all the logic to the special `remove` function, and unbinds all the events properly.  To unbind them, the event handlers are now _methods of the DOM component.

There was an also an issue where undraw would throw when the entity's element wasn't actually attached directly to the stage.  It's now just removed from its parentNode.

Adds tests to cover invalidation and cleanup.
Pause *before* firing "AnimationEnd"

Currently, if you try to play a new animation by binding to "AnimationEnd", it'll be paused right after the event fires.  This just switches the order, and adds a test for animation chaining.
Merge pull request #728 from starwed/defineProperty

Switch to defineProperty; set enumerable flags to be consistent with private/public properties
Merge pull request #727 from starwed/dom-removal

Reorganize init/removal of DOM component
Improve "Color" init/remove routine

- Allows the "Color" component to be properly removed from entities.
- Properly invalidates the entity when "Color" is added.
- Adds a test for removal of color
Merge pull request #731 from starwed/anim-pause-order

Pause *before* firing "AnimationEnd"
Merge pull request #733 from starwed/color-fix

Improve "Color" init/remove routine