started query page improvement, better error reporting for regexes

Search Page
* don't replace HTML, use show() and hide()
** unsolved problem: action button doesn't work after switching
* pretty pagination controls and table styling for query history

Parser
* annotated regexes with 'Expected' texts

buildout
* pinned SQLAlchemy to 0.7.9 because of a bug(?) in 0.8b2