fixed socraticqs image copying
added filtering of non-public questions
added public vs. private content domains
added publicOnly form option
added /private content domain to cp.conf
fixed various pdflatex problems by running in sourcedir, output to tempdir
many improvements to support livetutorial
added live tutorial
reorganized /docs /remix /socraticqs /socraticqsp paths
changed color scheme and layout
updated status in dev plan document
turned off autoreload to reduce CPU load
added support for using mongodb auth to connect to db