Use faraday to allow EM HTTP backends

[airbrake]

Use faraday to allow EM HTTP backends

[betamatt]

Alternatively, Airbrake could be refactored a little to allow a custom Sender class. That way I could package a faraday implementation in a separate gem without introducing dependencies to base airbrake.

[betamatt]

Investigating further I found that Airbrake can already be configured with a custom sender that responds to #send_to_airbrake. Works for my needs.

[thibaudgg]

@betamatt can you give an example on how you have do that. It would be great! Thanks.
I would like to use Airbrake inside a simple cramp app.

[betamatt]

https://github.com/Viximo/airbrake-faraday_sender

[thibaudgg]

Thanks!