when restoring the appcontroller, binding to IP from ifconfig instead of from local state, which is not yet initialized in that case
using email address instead of session id to identify users, fixing issue 220
added docstring to create_token
not erasing temporary files if the appcontroller is revived within the same appscale deployment
removed extra newline
using Strings instead of Symbols in instance variable usage so that it gets backed up and restored via ZooKeeper correctly
disabling ability for appcontrollers to scale up to new nodes, since it erroneously detects itself as failed when it revives
deleting cookies via the same IP they are set with (the public IP), fixing issue #79
Merge pull request #223 from shatterednirvana/delete-cookie-on-logout

Deleting cookies via the same IP they are set with
Merge pull request #221 from shatterednirvana/use_email_instead_of_ip_for_token

Use email address instead of session id to identify users
Merge pull request #215 from shatterednirvana/appcontroller-revives-properly

AppController revives properly