Merge pull request #29 from talentral/master

return non_field_errors and field_errors separately
Merge pull request #30 from talentral/master

added tests for qrcode (more like PIL/Imaging)
added AbstractModelInstanceUpdateForm, a super robust form
cleaned up apps.accounts.forms significantly
Merge pull request #31 from pkkup/master

added AbstractModelInstanceUpdateForm, a super robust form