Backend Models use the full import path instead of just a slug to find their code modules.
PEP8 line length. Remove an unused import.
minor things and metadata. Use Manifest to stop shipping tests.
Testing - since ArmDev now defines logging (in armstrong/armstrong.dev@ff2bdc7cdcddf23b5ac113363985a6fca8b58fae), make sure our more precise NullHandler doesn't propagate so it stays silent.