first pass at backfilling
Merge branch 'develop' into backfill
Merge branch 'develop' into backfill
restore SeriesTask query
allow_backfill allows backward advancement
add allow_backfill test
add basic backfill test
more meaningful test for backfill: yes
move backfill tests to their own method
add more emit_series tests
clean up discover tests a tad
more tests
more emit_series tests
check for latest_season before try_next_season so we dont do too much searching in backfill mode
make sure were on latest season before trying to advance to next season
test season advancement
dont keep trying to backfill on reruns that are season advancements
Merge pull request #233 from nlf/backfill

Add series backfill support:
- Add allow_backfill option for series plugin
- Add backfill option for emit_series plugin