Added 2D vector operations.


git-svn-id: svn://svn.code.sf.net/p/vpinball/code/trunk@964 14438d79-0ffd-4333-8ae7-ea2bdd901387
Added some comments to ramp code, cleaned up the code a bit.


git-svn-id: svn://svn.code.sf.net/p/vpinball/code/trunk@965 14438d79-0ffd-4333-8ae7-ea2bdd901387
Added check for degenerate triangles in ramp collision code.

This fixes the stuck balls on WCS'94.


git-svn-id: svn://svn.code.sf.net/p/vpinball/code/trunk@966 14438d79-0ffd-4333-8ae7-ea2bdd901387
Merge branch 'master' into dev