Three bugs:
- The parser wrapping was generating hashes for fallback values in absence of actual values for both URL and title (which is valid if obscure RSS), URL and content, or title and content; now fallback values are detected and empty strings used instead of hashes
- The deduplicator was assuming all three hashes would always exist, which is no longer the case
- The database matcher was making the same assumption as the deduplicator
- 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
- Ensure Web server is up before running tests (skip otherwise)
- Place expected timestamps closer to assertions, to lessen chances of off-by-one failures
- Makes use of PHP's internal Web server to deliver expected responses from a real server
- Windows batch file can be used to run tests (Linux and Mac test runners to come later)
- Added PHPUnit to dev dependencies
