RPC level 1 implementation

[nemoNoboru]

Hello there! I am a google summer of code 2016 student and my project was to implement an level 1 CapnProto RPC.

I used as a base your binding and then just extended it. You did a splendid job. It was pretty easy to work with your code.

I did the RPC with simplicity in mind. I wanted to make it as easier as possible. But without losing too much power. The blocking parts of the system always run without GIL so another ruby threads can run while the RPC waits.

Is fully usable and the only known bug at the moment is that the server don't shutdown when pressing control-c. It only closes when you press control-c and then a request is made to the server.

[nemoNoboru]

hello again, if you don't mind i will publish my work as a gem called "capn_proto-rpc" so the community can use it.

If you like my work and merge my changes i will delete my gem and tell the community to use the main capn_proto gem instead. Thanks!