Converted to setuptools
Fixed Contributing section of README
Added first unit tests.
Added test for relative path
Converted AUTHORS and CHANGES files to markdown
Added lint task to run flake8.

Also, fixed a missing space to make dirwalker.py pep8 compliant.
Integrate flake8 with setuptools & setup.cfg

Installed flake8 in virtualenv and added to requirements.txt. Then added
setup_requires to setuptools and configured flake8 in `setup.cfg`
Use function in setup.py to find dirwalker version.
setup.py refs  MIT license instead of LICENSE.txt
Initial invoke release task
Merge branch 'feature/invokedeploy' into develop
Removed lint from release task
Updated CHANGES for v0.1.2
Merge branch 'release/v0.1.2'
Merge branch 'release/v0.1.2' into develop
Fixed `git checkout develop` in task.py
Closes #1
Closes #2
Use pandoc to convert README.md to rst
Merge branch 'release/v0.1.3'