simplify NetDispatcher spec
NetDispatcher#dispatch: take both address and message
RuboCop: disable AlignArray
TaskDispatcher: inject net_dispatcher and reimplement spec
bundle update
bin/kamerling: abort on all exceptions
Hanlder#handle: ignore invalid inputs
require Server#join to exist
Server: log starts
Server: log connects
Server: log messages
add Server#disconnecting and #stopping stubs
add Addr#to_s
Server: use Addr#to_s in log messages
RuboCop: don’t worry about Handler#handle exceptions for now
bin/kamerling: turn on logging, turn off debugging