**Breaking changes**
+ Make the module compatible with async discord bots
+ getnative() function is now async
+ getnative() function returns now 3 values: best value string, pyplot and class object of getnative class
Example of how to use it in a bot:
https://github.com/Infiziert90/Tsuzuru-Bot/blob/master/commands/vapoursynth_commands.py#L165