Rework transport to leave re-connect to user

[elupus]

Avoid handling reconnect inside transports. Signal lost connections via the event system instead to allow user to manage the reconnections.

• Remove reconnection logic in favor of user handling that
• Handle a socket shutdown leading to 100% cpu uage
• Split Connect from Transport construction
• Split connect() effects and errors from class initializers to allow easier cleanup

[elupus]

@Danielhiversen any chance you can have a look at this and perhaps make a new release? Should solve most of the disconnect and reconnect issues rfx have had.