Includes PHPDoc license tag in the file-level block with accompanying copyright notice.
Also added an AUTHORS file on the off chance of outside contributions
- Also made all SQLite tests skippable if the extension is not loaded
- Fixed format of ETags in test server
- Passed any CLI arguments to PHPUnit in the test runner
- Test files now consist entirely of traits:
- General setup trait mocking User class and cleaning up
- Driver trait to set up the database connection
- Series trait containing tests for the series, independent of driver used
