merged in from master; only stylesheets right now
styled the nav bar
restyled and simplified the sidebar
added a nav bar
added facility for seeing lesson numbers given a unit - for nav bar, mostly
integrated sidebar into controllers
allow angular expressions as title-closed ad title-open
working offline; will remove for production (i.e. server angular and jquery from the web, not the server)
local versions of jq and ng
made thinkful header clickable
removed the border from the top element of the nav bar
changed nav title styling
changed nav title styling
made links work properly
terminated telltale traces of tests and trials
simplified the backj-end due to the fact that tha schema and curriculum are precompiled