Created setup.py to enable pip installation
Removed first name from LICENSE and setup.py
Shuffled project directory structure

- The cronex source code has been moved into a package folder with an
  __init__.py file out of the repository root for a cleaner, less
  cluttered layout.
Moved SYNTAX documentation into README.md
Code clean-up, improved PEP 8 compliance

- Added docstrings to all unit test functions and some comments to
  explain some of the less obvious parts of the code.
- Minor tweaks here and there to improve PEP 8 compliance.
- Removed a couple of vestigial branches of code.
- Sorted imports in cronex and cronex.tests.
- Swapped out the implementation body of __str__ with __repr__ in the
  CronExpression class.
Repository-meta tweaks

- The CHANGELOG has been renamed to CHANGELOG.deprecated since I now
  write reasonable commit messages.
- Removed the copyright year from the LICENSE file.
- Modified the __license__ metadata of the cronex package to list one
  license.
- Renamed README.markdown to README.md.
Added explanation to CHANGELOG.deprecated