Changing the focus style of the slide and also made it use the primary palette for color
Merge branch 'material-sprint' of github.com:google/web-starter-kit into material-sprint

* 'material-sprint' of github.com:google/web-starter-kit:
  Add new cards component implementation
  Move paper-card into shadow demo
  Remove card demo from shadows
  Switching header panel header text to correct typography
  Backing out assets until revisions ready
  Implements header-panel.
  Changing the focus style of the slide and also made it use the primary palette for color
Adding focusing an fixing up styles for the checkbox