Delete stubs for SensorMemory class
Add the UML model from Rational Rose

Includes:
Use Case Diagram
Class Diagram (3-tiered)
Add classes autogenerated by Rational Rose

Sensor
SensorMemory
ControlModel
Granule
Add constructor for Granule
Implement Sensor class

Stubs for the sensor's value since the real sensor is not available
Partially implement SensorMemory class
Partially implement ControlModel class