More test cases and refinement of rules


git-svn-id: http://umple.googlecode.com/svn/trunk@3933 6ebf9d09-8eb1-0036-9d08-68c07d1b990a
UMplification in the user manual

git-svn-id: http://umple.googlecode.com/svn/trunk@3934 6ebf9d09-8eb1-0036-9d08-68c07d1b990a