[#6692] Added API for starting and checking status of project export

Signed-off-by: Cory Johns <cjohns@slashdotmedia.com>
[#6692] Fixed typo

Signed-off-by: Cory Johns <cjohns@slashdotmedia.com>
[#6692] Fixed issues with OAuth changes from review

* Removed unused authorized_applications
* Fixed Consumer Key value being used for Consumer Secret
* Removed unused name constructor param when creating access token
* Renamed poorly named "id" param
* Removed no longer used views from PreferencesController
* Fixed and improved OAuth tests