ENH: make the readme the long_description
(used in PyPI, https://scikits.appspot.com/)
DOC: PyPI needs rst, first try at converting the md readme.
DOC: github handles and links
DOC: another github handle
BUG: wrong readme extension in setup.py
Merge pull request #375 from Jorge-C/long_description

Long description
added missing __init__ to tests for ssw
fixed relative links as pypi won't render as rst if they are present
pep8; fixes #377
Merge pull request #376 from ebolyen/RE373

added missing __init__ to tests for ssw
Merge pull request #378 from gregcaporaso/rst-pypi-fixes

fixes to README and setup.py to make our pypi page more informative
TST: Tests for ssw and tree had no init -> not installed by setup.py
DOC: A bit of info on how to add a new module
DOC: typo