Efficiency
- Cache results from can_process method in math adapter [https://github.com//pull/461]
Bug fixes
- Fix grammar issues in russian conversation corups (via @alxmamaev) [https://github.com//pull/462]
- Handle the case that a chat session does not exist [https://github.com//pull/480]
- Fix Hipchat session management (via @vkosuri) [https://github.com//pull/485]
Testing
- Move Django tests out of the example app [https://github.com//pull/481]