Update dependencies

Can't install from bower unless the dependencies resolve.
Merge pull request #2 from joneshf/patch-1

Update dependencies
Update name of Random
Avoid name collision in example modules
Add grunt build

Still needs writing properly, this just compiles all the modules
Throw an exception when a property test fails
Merge pull request #3 from purescript/exceptions

Throw an exception when a property test fails
Added Arb Nat, String, and some helpers.