moving utils to core

config/settings/base.py

core/__init__.py

core/time_utils.py

core/vfile.py

gracedb/alert.py

gracedb/api.py

gracedb/buildVOEvent.py

gracedb/models.py

gracedb/reports.py

gracedb/serialize.py

...edb/south_migrations/0040_migrate_eels_to_observations.py

gracedb/templatetags/timeutil.py

gracedb/translator.py

gracedb/view_logic.py

gracedb/view_utils.py

gracedb/views.py