Speedup adblock with blacklists and reorganize unit tests

Speedup adblock with blacklists and reorganize unit tests

1. Blacklist for pattern matching. 1 regexp has more than 1
signature. If the 1st match failed, there is no need to
match with the same regex a second time if the signature matched.
This gives us 20% speedup.

2. Cleanup for performance tests.

3. Tests reorganized. now we are checking pattern validation
plus performance timing. Simlifies testing.

4. Bump version to 0.5. The next patch will add option matching
so we will bump it to 1.0 once it is tested.