LedControl/Led.Matrix redesign; Includes tests

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

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
v0.7.56

- Redesigned LedControl API

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