Added a field to Semester to enable / disable the ability to enter workshift preferences
Started basic stubs for workshift views
Merge branch 'dev' of https://github.com/knagra/farnsworth into dev
Added workshift to the installed apps
Added changes from workshift_plan document
Added WorkshiftPool
Added AssignmentEntry
Merged Weekly and Semesterly workshifts into one class
Fixed most import errors
Merge branch 'dev' of https://github.com/knagra/farnsworth into dev