first development of multi-outputs (based on commands), multi datasets and multi scripts Engine

git-svn-id: svn://svn.forge.objectweb.org/svnroot/spagobi@23473 99afaf0d-6903-0410-885a-c66a8bbb5f81
some functions implemented for image output

git-svn-id: svn://svn.forge.objectweb.org/svnroot/spagobi@23474 99afaf0d-6903-0410-885a-c66a8bbb5f81