Issue 466, This is the fix to the class diagram part of the issue (adding the tooltip for each method/attribute, and a small change to the javascript to highlight only the method when selected). This required a change in the structure of the generation of the graphviz file. Also committed are a number of tests for the graphviz generation of class diagrams in general

git-svn-id: http://umple.googlecode.com/svn/trunk@4596 6ebf9d09-8eb1-0036-9d08-68c07d1b990a