Restore wedo_plugin folder - Update Primitives

I restore the wedo_plugin folder that was removed in previous merge request.
Also, I update the plugin with new system of Primitives for recent TurtleBlocks.
Aslo, I made some style changes and now, the plugin works like Lego NxT plugin.
Fix "usb.core.USBError: Resource busy #4"
Compatibility with new PyUSB 1.0.0 beta 2