added a cleaned up version of sensors.ino

This is a cleaned up version of sensor.ino from multiwii. I was able to get 1500 line down to 400 lines. There is still some clean up work to do but it is a good start. It contains all the code necessary to initialize and read ACC and Gyro data from the mpu6050.
added RawSensorData.ino

This is an arduino program for testing out the mpu6050. It reads raw data from the mpu6050 and either prints the data or sampling rate to the serial port.