v0.8 - H-Bridge Working

I no longer have access to working MegaMoto hardware, so unfortunately I have no way to develop and test new features.

Note on date of this tag: This tag is being created over a year after the last real code change. I wasn't as familiar with Git and releases back then, so I didn't bother with tags. I've learned lots since then and wanted a release to exist in this repo, even if the code hasn't changed for a year.

What's working in this release:

• Configurable PWMA / PWMB pin assignments
• Configurable Enable pin assignment (If no Enable pin is provided, it won't attempt to use Enable at all!)
• Handles the H-bridge hardware configuration
• Ramps motor up/down from current speed to the new speed
• Immediate stop/off. If there is some safety-critical setting, you can shut down your device immediately without ramping down first.

What I would have liked to add to this library:

• Handles the half-bridge hardware configuration
• Current sense reporting. Reads the voltage from the current sense output on the MegaMoto and converts it to milliamps (mA) and returns the milliamp value as an integer.
• Synchronous current sensor measurement for RMS and peak current readings
• Current limiting via PWM compression