Use case update. Closes #505
Clean username using default regex from django/mongoengine. Closes #484
Fixes to keep python2.5 support. Closes #481
Disconnect only valid users. Closes #224
VK backend doc update to reflect settings names. Closes #493
Make scope available for OAuth1 and OAuth2 backends
Ignore local settings file
Xing backend. Closes #506
Merged StockTwits OAuth backend. Closes #517
PEP8. Refs #517
Small code cleanup on mailru backend
Separate auth process to single method on OAuth

Separate auth process on OAuth backends to it's own method to ease the auth
process given an access-token. The enables the option of having views that will
perform the auth given an access-token (something requested to implement DSA on
projects with mobile UI)
Small doc about register-by-access-token feature
Fix exception instances. Refs #518
Split auth url and complete process in smaller methods
Remove ununsed attribute
Stripe backend
Link fix
Adding TripIt backend.
v0.7.9