Remove default responsive grid
    - this is because not all widths will be used so better replace it. responsive grid will be based on the site's need
Add new widths and delete flexflav-lt-ie10.css
Update flexaflav.css
  - added back fluid and responsive grid. this time, the grid is based on 5ths and 12ths
  - remove .solo class and width property of [class*="divvy-"] selector
  - added box-sizing property to [class*="divvy-"] selector
Remove width property
Change order value from 1 to 0
Update demo.js
    - added cleanNav() function
    - removed nav.(touchstart .. e.stopPropagation .. function
Update demo.js
    - changed touchstart to touchend in order to take effect after the touch event
    - added back the binding for [nav] but with a touchend event
Merge branch 'master' into gh-pages