Fix, and Switch to flask-admin

Hi there,

The code in your repository seems to be quite broken at the moment. The javascript does not work at all.
I have made a fork and switched it over to [Flask-Admin] (https://github.com/mrjoes/flask-admin)

Some other things:
- Use setuptools & setup.py
- Used Flask-Admin ModelView classes.
- Re-did the models to be an object instead of a global factory for each type.
- Replaced the task editor with [ACE] (http://ace.ajax.org/).
- Moved jobs.json and tasks.json into the 'data' folder.