Improving bar chart code

--removed deep-copy fix
Initial Commit

--Removed All migrations
--Add through in Many to many fields in Screening, Video and Training
resetting south for dashboard and video_practice_map

-- also changing all db_table to lowercase
Merge branch 'user_info' into through_model

Conflicts:
	dashboard/migrations/0020_update_village_grades.py
south resetting + workaround for m2m field in online save
Removing m2m tables from models and adding custom BigManyToManyField

-- added new folder fields in dashboard which now has all our custom
fields
-- in models all m2m tables are commented and BigManyToManyField is used
Merge branch 'through_model' into test_server_alt