collapsed method jit_answers into post_answers
added wlk.clear method
collapsed get_test as a copy of get_html, moved to simple
changed wlk.findOneByUserAndTest to find the last wlk of many
added wlk.creation_date, wlk.clear (which also clears wlk.start), assured wlk.start would reset when neccessary
fixed 'find' results (expected array, coded an object)
Wed Feb 12 21:36:44 MSK 2014