Implemented basic WePay donation flow.
Fixed 'type' parameter.
Fixed error checking.
Updated example config file.
Removed unused description from 'amount' input in WePayForm.
Added basic tests for donation result pages.
Added a bit more documentation.
Outlined endpoint that will receive IPNs from WePay.
Merge branch 'master' into wepay

Conflicts:
	metabrainz/config.py.example
Implemented creation of donation records in the database.
Method verify_and_log_wepay_checkout should probably be a class method.
Added a case for donations less than 0.50 USD.
Added missing checkout_id recording.
Renamed paypal_trans_id to make it more generic.
Removed unneeded is_donor_blocked method.
Removed unused import.
Fixed test for donation callback page.
Removed default config file.
Added basic testing infrastructure for models.
Fixed condition checking in verify_and_log_wepay_checkout method.