Fix a bug

Add the ability to change the sample rate. Prior to 1.6/1.7, the sample rate (the speed at which speeds are pushed to players) was locked at 20hz. In 1.7, it was moved to a static 10hz. In this update, you can now change the speed at which the plugin updates by chainging the sample-rate configuration swtich. It accepts a positive decimal or integer value. The default is 10 (10 times per second). The maximum is 20 (once per tick).

Fix two bugs

This is a smaller update that removes a redundant config key, and adds two new units: Kinetic Energy, and Mach!

This is a big update, in which I rewrote the back-end and increased the overall accuracy and performance, while decreasing the code footprint. I highly suggest you download this update.