Add donations model
Do the everything
Strip out extras in DonationInline
Dump data and don't allow negative donations
Add donations to data
Add some meta to Donations
Add (inefficient) last_donation to admin
PEP8
Merge branch 'master' into donors-donations
Add Donation.__unicode__()
Merge branch 'donors-donations' of github.com:thrive-refugee/thrive-refugee into donors-donations
PEP8
Merge pull request #52 from thrive-refugee/donors-donations

Closes #44