added picturefill init & simple box emboss mixin
breakpoints expanded into much more useful chunks
Update README.md
Update README.md
Added new vendor extends and reordered snippets
revised grid elements
responsive image max-widths
Added first draft of frontend javascript for touch events. Currently works with classes & structure of Mammoth Framework nav builder (see http://www.mammoth-framework.com).
Merge branch 'origin/master'

Conflicts:
	base/variables.scss