Merge branch 'release-0.3.15' into develop
Init version keys to timestamp, to prevent expired version keys from referring to stale caches
Set options.base_model_name during Options setup, rather than checking the mapper in a property.

Conflicts:
	baph/db/models/options.py
set default cache timeout at end of Options init, to ensure the correct cache is checked

Conflicts:
	baph/db/models/options.py
Bumped version
Merge branch 'release-0.3.16'