Make the package into a pip-installable project

This update changes the package so that it is pip-installable from github, and removes the commented-out and dud function _add_options()

Pre this merge the pip command would be:
```
bin/pip install -v https://github.com/rivimey/python-civicrm/archive/feature/setup_project.zip
```
and after merge this should work:
```
bin/pip install -v https://github.com/tallus/python-civicrm/archive/master.zip
```
The major element of this is to create setup.py. Please feel free to modify this!