Change to MPL 2.0 (work in progress)

git-svn-id: http://h2database.googlecode.com/svn/trunk@5677 e6896862-9d19-0410-bfb3-e9fa5d50e656
reduce synchronization bottleneck in processing date/time values by using a ThreadLocal for the cached Calendar object

git-svn-id: http://h2database.googlecode.com/svn/trunk@5678 e6896862-9d19-0410-bfb3-e9fa5d50e656