MODIFY grid layout to exclude margins and paddings.

Modified grid layout perfectly aligns with relative span widths. that is span10 = span5+span5 and so on...
MODIFY navbar component.

Reduced markup and renamed classes for simplicity,
Support for dropdown button that spans whole height,
Added nohover effect for ncell elements for elements that do not need hover effect.
Added divider that divides cells in navbar.
Changed nav and navbar as distinguished elements rather than parent child elements for support of navbar in standalone div elements.
Added clearfix for utilities
ADD dropdown component.
MODIFY reset

set font-size to 13px to all elements.