Tweaks to FastHierarchy
Tweaks to FastHierarchy

 * Added generics as much as possible
 * Deleted some dead code
 * Added a bit of javadoc

mbenz89/soot,mbenz89/soot,mbenz89/soot,anddann/soot,mbenz89/soot,anddann/soot,xph906/SootNew,xph906/SootNew,plast-lab/soot,anddann/soot,plast-lab/soot,plast-lab/soot,xph906/SootNew,cfallin/soot,xph906/SootNew,cfallin/soot,anddann/soot,cfallin/soot,cfallin/soot