Update TIMESTAMP_PATTERN to match with and without date prefix
Update to add h2 datasource and use it by default
Update to fix core unit test
Merge pull request #32 from zhfeng/hypersonic

Fix #27 use hypersonic by default
Merge pull request #33 from zhfeng/unittest

Fix #28 Most unit tests fail
Merge pull request #31 from zhfeng/timestamp

Fix #26 Parse log lines with and without date prefix
Update README.md