Merge pull request #12 from kylefinley/master

Fix: pass event (e) to _onLineBreak
Fix a bug that caused docked left to close on menu click
Minor reorganization of less files
less syntax fix on typography.less
Removed isInitiallyOpen prop on left nav
Doc Site - Added LeftNav documentation
Delay rendering of dialog content until dialog is shown, also add optional onShow callback to be passed in as prop
Added href prop to buttons
paper button css fix
Doc Site - Use link buttons
Doc Site - Added props to button examples
Update documentation site url
Update homepage url
Update contribute site link to new url
Doc Site - updated packages
Added all material design icons
Doc Site - updated gulp for new SVG sprites
use font icons instead of svg fixes #13
Doc Site - fixed icon on button example
Added Material UI custom icons