remove viaproxy (this disables proxy protocol)

Improvements to client

Add a new pitaya client with protocol buffers support. (topfreegames#75)

* Add a new pitaya protocol buffers client.

* Change channel pointer to a simple channel in ClienteInterface.

* Improve the documentation and solve some issues.

* Improve functions comments.

* Fix a typo and change the IncomingMsgChan buffer size.

include custom tags on nats rpc client metrics report

include custom tags on nats rpc client metrics report

Updating uuid dependency version

log handshake error

log on handshake and conn.Read

Feature/custom metrics (topfreegames#67)

* getting custom metrics on prometheus

* update on doc

* custom metrics example

* adding custom metrics on feature.md

redis password on worker