Remove errors.rb
Update Flay score
Add Hatetepe.start
Update Flay score
Replace Connection#parse with a simple attr_writer
Simplify ConnectionStatus

- connection.closed is fulfilled if the connection was
  properly closed by either the local or the remote
  side,
- and rejected if it was closed because of a connection
  or runtime error
Properly mark GC spec as pending
Update Reek config
Kill mutation in Connection::EventMachine#receive_data
Switch from #fail to #raise