Ron U

Added exception handling and stabilized code, as part of the solution for issue #5 (https://github.com/chroma-sdk/chroma-python/issues/5) . There is work to be done for the other classes.

Hi, I'm using linux (debian 8.9), and I just connected the razer black widow chroma v2 keyboard to the computer without installing any drivers (as razer doesn't supply linux drivers...