updates to doc
Fixup styles

* better styles on tables, removed old unusued too generic styles
* better styles on markers (although still not done)
* better styles on sliders
wicked-lame numerical slider answertype

* added selectedItem to slider
* made numericquestion type after multiplechoice design
* committed atrocities in the answerman to make them score
* added a question to the dB
* used this question on submitTests.html