* Websocket: Rename stream package
* Websocket: Rename Websocket to Manager
* Websocket: Replace explicit errs with common.NilGuard
* Websocket: Move websocket_types.go to types.go
* Websocket: Minor field comment and alignment in types
* Webosocket: Rename WebsocketConnection to Connection
* Alphapoint: Make gorilla ws import explicit
Just to avoid confusion with our own packages.
* Websocket: Move stream_match to match
* Websocket: Move websocket_connection to connection
* Websocket: Move websocket.go to manager.go
* Websocket: Break out all subscription methods into subscriptions.go
* Websocket: Move connection type into its file
* Websocket: Remove PositionUpdated
Type is not used anywhere
* Kraken: Use local constant for pong
Was the only use of websocket.Pong and doesn't really feel right to
represent kraken's api resp in one of our packages
* Websocket: Move connection sub-types to connection package
* Websocket: Move manager types into manager
* Websocket: Move ConnectionWrapper into manager
* Websocket: Move websocket_test to manager_test
* Websocket: Privatise connectionWrapper
* Websocket: Remaining types into types.go
These really belong somewhere else mostly, but this will do for now
* Websocket: Tidy up connection method vars
* Gofumpt: Moving package imports around
* Websocket: Rename errDuplicateConnectionSetup
* Websocket: Fix duplicate import of gws
* Websocket: Fix gofumpt -extra
* Websocket: Standardise import of gws across other pkgs
* Kraken: Remove unused sub conf consts
These were replaced by the generic Levels and Depth fields on all subs
* Websocket: Privitise ConnectioWrapper fields
* Websocket: inline single use var WebsocketNotAuthenticatedUsingRest
* Websocket: Move documentation to template
* Bithumb: Assertify TestWsHandleData
