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Initial draft of dedicated ESC class and tests

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
Ensure that an early return emits a move:complete

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
Fix esc-dualshock scaling values

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
ESC speed values refactor. Uses 0...1 (fractional values) as percent of total speed.

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>