Gemspec additions

Hello,

I saw your project a few days ago and I think it is a great Idea. I have been thinking of using the pyBitMessenger app, but would prefer a library and I am much more comfortable in ruby.

I have made some adjustments, particularly around adding a gemspec file for use with bundler and I have also created a /bin directory with an example app that fires up a client.

I am very interested in the project and would like to work on it some more as I currently have some free time. Do you have any pointers that I could use for sending a message with the library? I am able to run it and it connects, but I'll have to look deeper to see how to send a message.

Thank you,

-wjh