Merge branch 'tag_dev'

gracedb/admin.py

gracedb/api.py

gracedb/migrations/0002_auto__add_tag.py

...ations/0003_auto__del_slot__del_unique_slot_event_name.py

gracedb/models.py

gracedb/templatetags/logtags.py

gracedb/templatetags/slot.py

gracedb/urls.py

gracedb/urls_rest.py

gracedb/views.py

settings/default.py

static/css/style.css

static/images/minusButton.gif

static/images/plusButton.gif

templates/base.html

templates/gracedb/event_detail.html

templates/gracedb/event_detail_CWB.html

templates/gracedb/event_detail_HM.html

templates/gracedb/event_detail_LM.html

templates/gracedb/event_detail_MBTA.html