File re-factoring.
- Renamed index.js to src/promise.js like other fantasy-land
- Moved test.js
- Added gruntfile
Adding QuickCheck tests.
- Need to async tests.
Initial attempt at promiseT.
- Not entirely sure this is even correct.
Removing promiseT, seems it's actually impossible.
- It's not traversable see http://stackoverflow.com/questions/16418084/monad-transformer-for-nonemptylist/16818127#16818127
Consistent exporting - inline with other libs.
Merge pull request #9 from SimonRichardson/master

Updating the lib to be more consistent with other fantasy land repos