git-svn-id: https://wala.svn.sourceforge.net/svnroot/wala/trunk@4288 f5eafffb-2e1d-0410-98e4-8ec43c5233c4
added DFS path find that finds all paths in sequence rather than just one moved the WalaException out of warnings subpackage git-svn-id: https://wala.svn.sourceforge.net/svnroot/wala/trunk@4257 f5eafffb-2e1d-0410-98e4-8ec43c5233c4