Simpler Susy grid
A bunch of updates:
* Update Normalize
* bundle update
* Update README
* Add basic animation mixins
* Add a fixed layout stylesheet
Merge branch 'master' into tidy-grid

* master:
  Add a mixin that ties a breakpoint to certain grid settings for accurate span-column()s

Conflicts:
	stylesheets/_config.sass
	stylesheets/modules/_example_module_b.sass
	stylesheets/modules/_grid.sass
Merge pull request #3 from bensmithett/tidy-grid

Lots of updates