Added Unbind tests

[mschultz4]

In response to issue #166, I added a couple of more tests for Unbind. Please let me know if you see potential improvements.

[LeaVerou]

Thanks so much!!
We don't yet implement multiple namespaces per event though, so those tests should fail. Wanna comment them out until we do?

[mschultz4]

Certainly. Which tests should I comment out exactly? I am not sure I understand which will fail. Thanks

[LeaVerou]

Just convert events that use namespaces like click.namespace1.foo to use one namespace, e.g. either click.namespace1 or click.foo.
However, did these pass when you run them? If so, there must be some bug in them, since the functionality they're testing is not supported!

[mschultz4]

Oh ok, I see. That test was actually written by @jxc876 within request #169 and merged already. The reason the test is passing is because the listeners are attached to the first namespace and not the second level. I am not sure why the second namespace was originally included, but it adds nothing to the test and is obviously confusing so I removed it.

When I attach the listeners to the second namespace and run the test, they do indeed fail as expected.

[LeaVerou]

Cool! Please make these changes to this PR and it's good to go!

[mschultz4]

Awesome! I already included the changes in my commit.

[LeaVerou]

Oh, I hadn't noticed. Merged now, thanks!!