Add a configuration file for coffeelint.

I've added a configuration file for coffeelint that currently tests for
- arrow spacing
- colon-assignment spacing
- empty-constructor parentheses
- parameter-less function parentheses
- object braces
- isolated arobases
- spacing around operators

The level of these specific tests have been set at 'error' because the corresponding rules seem to reflect the implict standards of the code as it is already.

Coffeelint warnings have also been added for line length and cyclomatic complexity.