use new API
Emit CLI argument parsing errors to stdout (instead of stderr).

Tor will log any lines received on stdout by a pluggable
transport. This might help debug situations where the user had a wrong
ClientTransportPlugin torrc line.
Better use of exceptions in Extended ORPort code.
Pass name of pluggable transport to Extended ORPort.
update to new pyptlib API
Merge remote-tracking branch 'ximin/pyptlib-api'
Add a ChangeLog entry for the pyptlib API update.
Do the release ritual for obfsproxy-0.2.3.