2. more accurate model of array copy
3. bug fix in subtype test for class hierarchy
4. bug fix in OTF call graph fix point iteration
5. bug fix for RTA and ClassNotFoundException.
also misc. minor cleanups
git-svn-id: https://wala.svn.sourceforge.net/svnroot/wala/trunk@2073 f5eafffb-2e1d-0410-98e4-8ec43c5233c4