feat colors: Material design color palette with Sass

Create all the colors variants from material design guidelines.
http://www.google.fr/design/spec/style/color.html
chore demo: move demo scss file to demo folder
chore demo: change colors label for better visibility
feat colors: add new colors to default settings
chore demo: remove empty lines from colors scss
chore demo: colors as first css demo
chore demo: notifications as first services demo
chore dist: update
Merge pull request #4 from lumapps/feat/colors

feat colors: material design color palette with Sass
fix buttons: increase font size for icon buttons
chore demo: add script to create a new tag release

The releases had to be managed manually. And the demo homepage was getting the last
release from the GitHub API. The last release is now generated from a script and upated
staticly in the homepage for better performance and to avoid GitHub's API rate limits.
feat toolbars: add toolbar component
chore demo: add toolbar example
fix buttons: change default sizes
chore bower: update ignore file
chore demo: add toolbars link in sidebar
Merge pull request #5 from lumapps/feat/toolbars

feat toolbars: add toolbar component
chore release: remove push to master when creating a release
chore release: add untracked file in tag
fix toolbars: padding according to buttons size