Modified tests to remove RSpec warnings

With RSpec 3.0, the :should syntax has been deprecated in favor of syntax using :expect. Running the tests was giving a warning about this deprecation.

Also, RSpec shows pending tests that pass as failed tests. This can be changed through config modifications, but I think it's easier of all tests pass from the beginning. Changed "pending" to "skip" in the initial 'conjured item' test set, so that they no longer fail because of this.