Updated to v1.3

- Fixed grid/column width issues in mobile media queries
- Fixed CDN URLs of HTML5 Shiv and respond.js
- Updated 'Animations' plugin
- Updated 'backbone-vars.less' with more variables
- Updated 'backbone-frame.less' to accommodate new variables
- Updated 'backbone-frame.less' with some new element values
- Updated 'backbone.js' with 5px offset to Tipsy tooltips
- Updated 'style.less' with '#Global' section