several bug fixes

- add iOS4+ compatibility (usually iPhone/iPod 3GS devices)
- fix IE10 background color on active links
- add "vertical-align: middle"  also on <canvas>
- remove "width: auto" on <video> element to fix iOS4 Mobile Safari
- move on starter-kit file worpdress core CSS
- remove super-simple grid helper classes (unuseful)
- update hight resolution screen media query placeholder

TODO:
- re-compile no-IE7 and compressed/minified files
- add more option to fluid grid system (see unsemantic and kraken CSS
frameworks)