Fixed minor issues in imdb module.

* The term is now encoded, as to prevent users from adding GET parameters.
* The JSON.parse called is now wrapped in a try..catch, to catch malformed json responses.
Added test for help module
Added tests for the imdb module.
Added more comments to ExampleTest.js.
Merge branch 'tests'.

* Added tests for two more modules; imdb and help.
* Added comments in ExampleTest to try and explain some basics of what is going on in the tests.