Continued test updates

Continued test suite updates to prepare for the Rails 3.2 upgrade. 

* Upgraded the VCR gem and made it re-record the HTTP requests every 30 days so things don't get *cough* two years *cough* out of date.
* Should resolve: http://code.google.com/p/otwarchive/issues/detail?id=3651
* We need to check importing Fic and Art from DW/DA/LJ
* Added the backtrace (-b) flag to our .travis.yml file to help us better debug