updated atomic submodule
Merge branch 'master' into demo

* master:
  updated atomic submodule
  gitignore update
updated jade grunt
added grunt clean
updated index.html to point to the compiled dist/index.css
Merge branch 'demo'

* demo:
  updated index.html to point to the compiled dist/index.css
  added grunt clean
  updated jade grunt
  updated atomic submodule