Card 101

- Added style for app-header (this includes the global action button) when clicked it needs to display a modal.
- Added the styles for toolbar, including folder navigation and the toolbar actions icons.
- Added some styles for responsive views.

@ghislaineguerin yes, bootstrap has built in button sizing. http://getbootstrap.com/css/#buttons-sizes

Please take this class out because it will overwrite the one being used everywhere.