remove theme.less and split preboot.less to mixins.less and variables.less to isolate customization from function

fix problem with error styles in forms that clashed with alert-messages by qualifying the .error with .clearfix

remove qualifying tags in .span selectors for built in grid so that we can use .span-n classes in form styles

oops, double commit last time; apply fixes to make select elements line up in IE7 with their labels, but no height fix

overhaul docs CSS since it was scalable, converted docs mastheads and footers to classes and HTML5 elements, add masthead to js docs page but make it slate so it looks cool and stands out

update the modals and alert-messages to use the same .close styles, save for some positioning in the modal after knocking down the modal padding

bump css to 1.3.0, update makefile to reflect that, update form css to prepend form to the .clearfix to prevent some bullshit, small tweaks elsewhere

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