Cleaned up Tek5014 driver.

Removed unused methods. Removed channel sub-classes. Code needs to be tested
before it can be merged.
Merge branch 'feature/tek-cleanup' into develop

Conflicts:
	common/+deviceDrivers/@Tek5014/Tek5014.m
Move Tek5014 driver out of @folder

--CAR and BRJ
isConnected property

Check before connecting or deleting.

--CAR and BRJ