Merge pull request #2 from lbjay/master

modified to not use dict comprehensions (not available in 2.6)
fixed jays bugs
privacy of tags respected-a
support for privacy of tags
added new files, started refactor
more cleanup, at can i post to postable
postabesforuser updates
many postable to membable changes
more membable fixes, invitations, and some in items and tags
major changes to posting docs/tagging docs
changed queries to be simpler. still tdforitems needs work
finished deletions, but will handle how deletions of postables affect tags etc later
small fixes, postingdoc deletion, step back on restricts
started migration script, library as member issues
mostly working migration script, some changes to social
changes for better dealing with tags
fix for uniqueness in tags
no notes in stags, for both items and posting docs
changes to quantify mismatch, suggestions, install scripts, etc
remobed dropdb