Documentation; use fluent buffer writes

git-svn-id: http://h2database.googlecode.com/svn/trunk@5236 e6896862-9d19-0410-bfb3-e9fa5d50e656
Documentation, formatting (remove trailing spaces)

git-svn-id: http://h2database.googlecode.com/svn/trunk@5237 e6896862-9d19-0410-bfb3-e9fa5d50e656