major refactorings, more configurable settings
added CONTRIBUTING.md
added CONTRIBUTING.md
added cssmin to grunt tasks
seperated social icons into seperate modernizr (yep/nope) loaded files
and updated templates with new conditionally loaded social icons files
updated test source files
WIP - adding demonstration of helpers to kitchen sink
udpated resizer
removed z-index from positioning helpers
added info option to UI states mixin
fixed missing button modifiers
fixed up resizer toolbar bug
Merge branch 'master' of github.com:groundworkcss/groundwork

Conflicts:
	src/scss/_settings.scss
	src/scss/base/_grid.scss
	src/scss/core/_defaults.scss
	tests/css/test-ui-elements.css
added animation mixin and modified spin mixin to be subset a of that
updated resizer
attempting to fix up the filter shadow fix only for retina
Merge branch 'master' of github.com:groundworkcss/groundwork
Write loop that fixes #164 unnecessary styles with responsive grid.

Had shorter code written, but found out variable interpolation within a
variable can't yet work with the current version of Sass.
Run grunt build && grunt tests