Refactor
Fixing tests for more browsers
Change helper method names, check for undefined on cached `supportLocalStorage` method.
Changed my mind. Another renaming of functions
Merge pull request #159 from mobify/v2.0-webp-support

WEBP support
Merge remote-tracking branch 'origin/v2.0' into v2.0-picturefill

Conflicts:
	build/mobify-2.0.0alpha3.js
	build/mobify-2.0.0alpha3.min.js
	src/resizeImages.js
	tests/resizeImages.html