Remove references to setup target in makefile
Add py34 to tox.ini
Treat output as bytes when generating RunProcessError.message
Update CHANGES for 0.3.9
Bump version to 0.3.9
Add CONTRIBUTING.rst
Fall back to "which" if "command -v" is not available
Update CHANGES
Bump version to 0.3.10
Handle failure to import pty
Tighten scope of try/except block
Update CHANGES for 0.3.11
Bump version to 0.3.11
Merge branch 'master' into local

Conflicts:
	setup.py