Started server-side implementation of operation order.
Completed last operation by date and added first operation by date.
Added getOperationsByDate method and tests.
added getFutureOperations method and tests.
Moved the operation date and order calcuation to the submitOperation method to ensure that this is always set up correctly.
Created initial support for operation date (and order).
Updated operation to use operation date in lists instead of creation date.
Completed the operation date field logic.
	Updated to use the correct time when setting which operation the new operation will occur before
	Added the creation date and operation date to operation lists
	^inv-103 completed
Merge branch 'feature/op_date' into develop