Fix deprecation warnings in specs
Specify the problem

If one packet contains exactly the declared data size, but not the line
terminator chars, then they will not be consumed and will block
consumption of further commands
Fix handling of responses which take bodies

There was miscounting in the consuming of the bodies when the associated
line terminator did not turn up in the same delivery.

Removed the check on the return value of the `handle` methods. They
duplicate the check made in `handles?` and nothing is ever passed to
`handle` without first being tested in `handles?`.
Merge pull request #2 from pusher/split_response_fix

Split response fix