Merge pull request #1448 from pjackson28/master

Added missing clear in tabbed interface working examples
Merge pull request #1450 from pjackson28/master

Enhancements to Grids system
Merge pull request #1451 from pjackson28/master

Corrected padding in tablet view and moved mobile wb-main-in padding specification from theme CSS to Grids CSS.
Merge pull request #1452 from pjackson28/master

Removed event handler nesting in multimedia.js to resolve #1428
Merge pull request #1454 from pjackson28/master

Fixed Grids issues
Merge pull request #1455 from pjackson28/master

Removed h1 left/right margins in tablet view
Added language direction row to i18n.csv file.