Tomasz Dysinski

fixed incompatibility on node 4.1.0 on windows.

9

I couldn't run beefy on node 4.1.0 on Windows because of something they changed in `Buffer.concat`. This change resolves the following error: ``` beefy (v2.1.5) is listening on http://127.0.0.1:9966 200...

Added license title so legal will let us your implementation :).