Clarify the ochopod proxy IP that is being used

[stphung]

Would it make sense that when specifying the ochopod proxy to connect to as a command line argument it should override the OCHOPOD_PROXY environment variable?

I was trying to connect to an ochopod proxy by saying ocho cli <ip> but it was using the one from my environment and I had no idea for awhile. Would definitely be great to clarify this.

➜  ochothon git:(master) ✗ ocho cli <ip removed>
internal failure <- No JSON object could be decoded