Added Group initialisation and __repr__ functions
Adding Group CRUD Operations
Modifying user privileges and leaving privileges to the based on group privileges
Removing user privileges and making control of privileges be based on group privileges
Modified CRUD operations removing create and update from save function that has since been deleted
Modified CRUD operations to reflect changes in api functiosn
Modifying supplier functions to comply with ApiController
Added documentation for GroupController class
Completed the update and delete functions of GroupController
Created requisition Controller
Added CRUD Operations
Created DepartmentController to handle CRUD operations on Department instances
Created RequisitionController to handle all CRUD operations on Requisition instances