Gemify

Nice work on the serialport-server. It helped me a lot to visualize my arduino output on the web using D3. I saw that your last commit was 2 years ago. I started updating the gem towards the now more commonly seen "best practice" structures using gemspecs etc. as opposed to Hoe.

Functionally nothing changed, however, because of the use of require_relative it's ruby 1.9.3+. So I suggest you bump the version to 0.1.x as opposed to the 0.0.3 now. 

Hope you like it.