Some cleanup and simplifications to collision code.


git-svn-id: svn://svn.code.sf.net/p/vpinball/code/trunk@944 14438d79-0ffd-4333-8ae7-ea2bdd901387
Change to hopefully make running VP as administrator unnecessary, even the first time.


git-svn-id: svn://svn.code.sf.net/p/vpinball/code/trunk@945 14438d79-0ffd-4333-8ae7-ea2bdd901387