Misc fixes/cleanup
Merge pull request #3 from dchaplinsky/social

Social signon/signin
WIP: load_to_mongo.py script is under refactoring now to make it work both with S3 and local storage. Few bugs were also fixed there, S3 settings moved to settings.py, unshred version bumped to 0.0.5, pep008 issues in settings.py fixed
Finished work on local storage for shreds
Merge pull request #9 from dchaplinsky/robust_split

Robust split
Admin feature
Merge pull request #10 from dchaplinsky/admin-users

Admin feature
Merge branch 'master' into simultaneous
CR fixes