Cleanup the MLX module
Cleanup the MLX module

* Set update rate to 32Hz
* Use ambient temp to scale IR data
* Return a GRAYSCALE or RAINBOW image

openmv/openmv,iabdalkader/openmv,kwagyeman/openmv,SmartArduino/openmv,tianzhihen/openmv,openmv/openmv,tianzhihen/openmv,SmartArduino/openmv,iabdalkader/openmv,kwagyeman/openmv,tianzhihen/openmv,SmartArduino/openmv,iabdalkader/openmv,kwagyeman/openmv,iabdalkader/openmv,openmv/openmv,SmartArduino/openmv,kwagyeman/openmv,openmv/openmv,tianzhihen/openmv