change up the z-indexing and add some popover/twipsy content to the test modal on the js docs to help avoid future bugs

another quick pass at ranking all zindexes and listing them in variables for quick overview and editing later

overhauled dropdowns now require use of .caret for dropdown arrow, redid the button group docs section, added the split button dropdown docs section

front page docs updated to include old getting started section, update code styles to look like github gists, and lots more docs updates

Twipsy now respects custom classes

The test case verifies that a custom class is respected.

If you had a custom class to the root object twipsy would overwrite
that class ($tip[0].className = 'twipsy'), now this has been changed
so it removes only classes that twipsy adds.

move mega link footer to scaffolding to try it out, fix broken button text shadow, change UL/OL margins back, make li color same as body

Tweak the docs and address the new forms list of controls: radios and checkboxes are now hanging controls to wrap text properly

breaking out patterns.less even more, removing unnecessary div from checkbox and radio lists--now just labels and inputs

Conflicts:
	bootstrap.css

Conflicts:
	bootstrap.css