Rename dmcc_motor_test to dmcc_motor_test.py
Update and rename dmcc_pid_test to dmcc_pid_test.py

Changed default cape number to 0 instead of 1.
Changed motor.py so that it correctly addresses both motors.
Renamed example files to end in .py.  Changed pid_test so that it
addresses cape 0 rather than 1.
Merge https://github.com/csik/DMCC_Library
Merge pull request #3 from csik/master

Tiny example changes