R-tree bugfix

git-svn-id: http://h2database.googlecode.com/svn/trunk@4944 e6896862-9d19-0410-bfb3-e9fa5d50e656
MVTableEngine: support online backup on Windows

git-svn-id: http://h2database.googlecode.com/svn/trunk@4945 e6896862-9d19-0410-bfb3-e9fa5d50e656
MVTableEngine: concurrency

git-svn-id: http://h2database.googlecode.com/svn/trunk@4946 e6896862-9d19-0410-bfb3-e9fa5d50e656
Issue 484: H2 Console tool

git-svn-id: http://h2database.googlecode.com/svn/trunk@4947 e6896862-9d19-0410-bfb3-e9fa5d50e656