Delete moto-x-flash

This project is going to switch to pyfastboot

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
Update package setup and readme to reflect change to pyfastboot

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
Bump copyright year

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>