* Bitfinex: Fix WS trade processing
* Add handling for funding trades
Fixes#1746
* Linter: Disable shadow linting for err
It's been a year, and I'm still getting caught out by govet demanding I
don't shadow a var I was deliberately shadowing.
Made worse by an increase in clashes with stylecheck when they both want
opposite things on the same line.
* Bitfinex: Move websocket constants to websocket file
* Bitfinex: Rename channel consts
* Bitfinex: Send individual WS trades down the DataHandler
