add under-score _ to the end of data member names in Thread class
add under-score _ to the end of data member names in Agent class
add under-score _ to the end of data member names in Behavior class
add under-score _ to the end of data member names in ThreadedAgent class
add under-score _ to the end of data member names in Environment class
add under-score _ to the end of data member names in SensorController class
add under-score _ to the end of data member names in ThreadedSensor class
add under-score _ to the end of data member names in MockAgent class
add under-score _ to the end of data member names in SpyBehavior class
add under-score _ to the end of data member names in MockSensorController class
add under-score _ to the end of data member names in MockSensor class
add under-score _ to the end of data member names in MockRunner class
Merge pull request #27 from cad-san/fix-name-of-member-variable

Fix name of member variable