Demo and API docs

##<paper-styles>

The <paper-styles> component provides simple ways to use Material Design CSS styles in your application. The following imports are available:

1. color.html: a complete list of the colors defined in the Material Design palette

2. default-theme.html: text, background and accent colors that match the default Material Design theme

3. shadow.html: Material Design elevation and shadow styles

4. typography.html: Material Design font styles and sizes

5. demo-pages.html: generic styles used in the PolymerElements demo pages

We recommend importing each of these individual files, and using the style mixins available in each ones, rather than the aggregated paper-styles.html as a whole.