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

big update to change the alerts, normal and block level, to have simpler css and new colors independent of the base color scheme

Also added id fields to selects where needed

pull filter gradients out completely because IE can't render them correctly in half of all instances and they are performance problems with them; tweak alert message styles, particularly close button;