v0.6.1

• Switch to setuptools to run the entire build
• The various Makefiles have been merged into one inside lib for posterity
• A new top-level Makefile wraps "python setup.py"
• argparse.py has been removed and is installed automatically by setuptools/pip
• setup.py and the python/khmer directory have been moved to the root of the
  project to conform to the standard layout
• The project contact address is now khmer-project@idyll.org
• Due to the new build system the project now easily builds under OS X + XCode
• In light of the above the installation instructions have been rewritten
• Sphinx now builds the documentation without warnings or errors
• It is now easy to calculate code coverage.
• setup.py is now PEP8 compliant