first pass at enabling active states in dropdowns in topbar and fixing the bug of having an active class on parent dropdown

add reset filter to preboot for turning off gradients in IE when necessary; make :disabled [disabled] for crossbrowser usage

Also updated labels where required

redefine the grid to use attribute selectors with css regex, make previously fixed grid values use variables we use elsewhere

Made JavaScript unobtrusive by factoring out prettyPrint() to application.js. Also removed unused class from hero demo.

updated le docs to include note about topbar and padding on box (issue #86) and add snippet about @basefont and @baseline to type section

merged in my pending changes from 1.2-wip branch, resolve diffs as best as i could, update docs and alerts to use original classes, updated docs to include smaller section for layouts