add vs2013 proj/sln

git-svn-id: svn://svn.code.sf.net/p/vpinball/code/trunk@894 14438d79-0ffd-4333-8ae7-ea2bdd901387
fix vs2013 compile problems


git-svn-id: svn://svn.code.sf.net/p/vpinball/code/trunk@895 14438d79-0ffd-4333-8ae7-ea2bdd901387
More work on abstraction of rendering interface.
Renderer interface: made Material stateless
Made plunger render dynamically.
Made slingshots render dynamically.
Merge branch 'master' into dev