Updated coffeescript to v.1.6.2.
Updated mocha lib to v.1.8.2.
Update grunt lib to v.0.4.1.
Commenting out console.log statements used for debugging purposes. Added better documentation.
Bugfix: Flipping left and right values in an expression should also flip the operator, e.g. a > b should become b < a. Either way the flipping might not be needed in the first place. Thus, it has been removed.
Added dependency to underscore in package.json.