Issue 368: Support ON DUPLICATE KEY UPDATE syntax (test cases; currently disabled)

git-svn-id: http://h2database.googlecode.com/svn/trunk@5505 e6896862-9d19-0410-bfb3-e9fa5d50e656
Issue 368: ON DUPLICATE KEY UPDATE did not work for multi-row inserts. Test case from Angus Macdonald.

git-svn-id: http://h2database.googlecode.com/svn/trunk@5506 e6896862-9d19-0410-bfb3-e9fa5d50e656
Issue 551: the datatype documentation was incorrect (found by Bernd Eckenfels).

git-svn-id: http://h2database.googlecode.com/svn/trunk@5507 e6896862-9d19-0410-bfb3-e9fa5d50e656
MVStore: error compressing an empty page

git-svn-id: http://h2database.googlecode.com/svn/trunk@5508 e6896862-9d19-0410-bfb3-e9fa5d50e656