• fixes from Paul Driver: can_read doesn't behave correctly. The
  docs say it returns true iff there's a frame waiting to be
  read, but it's just a select() call to see if there's data
  on the socket, which can return both false positives and
  false negatives. While investigating this, I noticed that
  Net::Stomp::Frame->parse was modified at some point to take
  a socket as its argument. This is inconsistent with docs and
  probably not what was wanted anyway. parse and as_string
  should be symmetrical. Attached is a patch that fixes both
  issues and adds tests for them.