Progress commit, decorator system for adding pre and post processors there in spirit, missing complete testing and bug checking...
Fixed bugs in basic inheritence, added testing and ability for inheritence.
Fixed mixin type inheritence of preprocess and postprocess methods
Somewhat inbetween a refactor of the testing setup. Removing Flask-SQLAlchemy as a testing requirement, setting up testing in a slightly more on-demand explicit fixture setup style.
Rewrote the bulk of the testing to explicitly define fixtures, make more assertions, and work with 0.2 core refactor
Progress commit... Almost have impersonate mixin working as expected.
Got Impersonation mixin working properly

Impersonation fixes
* Had to change can_cls to not override current_user, but still need to override for creation step, so filtered out on can_cls call
* Fixed the query to use actual user table, not sure how that was supposed to work...

Python 3.3 and 2.6
* Pulled out the metaclass and used six to apply it
* Changed the assert raises to not use a context manager for 2.6
* Had to change bits of the metaclass to use itervalues and a list constructor

Misc
* Added original traceback printing support to the exception information for convenience of loggin