improve wording of SCRIPT...TO documentation

git-svn-id: http://h2database.googlecode.com/svn/trunk@5594 e6896862-9d19-0410-bfb3-e9fa5d50e656
Support the data type "DATETIME2" as an alias for "DATETIME", for MS SQL Server compatibility.

git-svn-id: http://h2database.googlecode.com/svn/trunk@5595 e6896862-9d19-0410-bfb3-e9fa5d50e656