Starting more comprehensive testing.
For consistency, default values should be strings not integers.
Wrong size, this should be crossSize not mainSize.
Remove parens.
Update comprehensive test.
Add utility to get an item's minimum main-size.
Add model to calculate auto size values.
Disable for now.
Add paragraph text to tests.
Generated output.
Merge branch 'develop' into feature/new-testbed

Conflicts:
	dist/reflexie.js
	dist/reflexie.js.map
	dist/reflexie.min.js
	grunt.js
	src/polyfill/container.js
	test/css/runner.css
	test/lib/tests.js
Merge branch 'develop' into feature/new-testbed
Updating comprehensive test.
Testing for auto cross-size values exposes plenty more failing tests :(
Unused properties.
Round 2!

New testbed, designed to test more values for both container and item elements:

width: auto | defined;
height: auto | defined;
overflow: visible | hidden;

Additionally, I've added child elements to flex children to make sure we're taking those into account when calculating new values.

As of this commit, 326 tests are passing, 724 tests are failing in Safari. Joy.

/cc @pci
Merge branch 'feature/new-testbed' into develop