Merge branch 'testing' into release

Conflicts:
	dist/crafty-min.js
	dist/crafty.js
	package.json

Crafty 0.6.3-beta

Update distribution files

Fix DOM coordinates translation on Chrome 32

It happened that on the latest Chrome (32.0.1700.77) both
document.body.scrollTop and document.documentElement.scrollTop were
valorized, this caused a wrong computation of translated position of mouse
pointer with a missing trigger of a `Click` event on a DOM entity.

Note: I setup a separate test page for this test case to be used only with
*real browsers* as I found really difficult to handle page scrolling with
phantomjs.

More details about it at ariya/phantomjs#10162
and gruntjs/grunt-contrib-qunit#34

(cherry picked from commit 1a87cf7)

Merge branch 'develop' into testing

Conflicts:
	Gruntfile.js
	src/drawing.js
	tests/core.html
	tests/stage.html

Merge branch 'testing' into release

Merge branch 'testing' into release

Bump version to 0.6.0

(cherry picked from commit fbcdcc2)

Merge pull request craftyjs#592 from pawurb/smoothier_collisions

Gravity collision detected only on top.

Merge pull request craftyjs#525 from starwed/viewport-cleaner

Viewport refactoring (round 1)