updated README
Merge branch 'master' into hoyt
Added a script to pre-fill a database with common managers and request types (Workshifts will eventually go in here, too)
Filled in duties for most managers
Made pre-fill.py executable
Fix the environment for pre-fill.py
Renamed pre-fill.py to pre_fill.py
Made managers and requests within pre_fill.py global variables
Added a test to make sure managers and request types are properly created
Merge branch 'master' into hoyt