Import all functions from `random` like other modules.
Add basic tests for functions in `nprand` module.

These are the `init` tests out of `denselocalarray` that just test the size and shape of the returned `localarray`.  At least we'll have some basic "do these functions run?" tests now.
Update `.travis.yml` to run tests for `random` package.
Merge pull request #58 from enthought/feature/add-random-tests

Add basic tests for functions in the `nprand` module