model:person: if not given, Person.emails and .groups default to [].
authorW. Trevor King <wking@tremily.us>
Sat, 6 Oct 2012 16:56:22 +0000 (12:56 -0400)
committerW. Trevor King <wking@tremily.us>
Sat, 6 Oct 2012 16:56:22 +0000 (12:56 -0400)
commit647deb2b10e44b1d2e73312591cd0455fe6d6aa0
treeb670dab7e05e65bc4a2234a38539fa7fc351ba71
parent6e1915419f95429eaa52b0af7bf202d8d09423ad
model:person: if not given, Person.emails and .groups default to [].

This avoids problems with trying to iterate None.
pygrader/model/person.py
pygrader/storage.py