Unit Tests continued, and clsYouTube documentation

- Added GPL text to all Unit Tests
- Added tests for EmberAPI\clsYouTube
- Added documentation for EmberAPI\clsYouTube
- All unit tests now coded either PASS or are NOT IMPLEMENTED. Most of
the Not Implemented variety are more integration tests, and rely on the
file system, database, or external websites, and are therefore much more
complex to create and maintain.
- Added TestTypeAttribute to differentiate between UnitTest and
IntegrationTest. In general, UnitTests will be quick to run, while
IntegrationTests may be longer duration.
- Made the unit test naming more descriptive throughout