Changes

<span style="color:red;">Version 2.5</span>(Updated on Mar. 15th, 2021):

* Use the silent PWM cooling fan, and support fan speed is control by script, support read fan speed, and we provide sample python code.

* <SPAN style="color:red;">You must install shell script to enable the PWM fan work fine since it's a PWM fan, refer to [[X735 V2.5 Software]]</span>