Update Visual Studio solutions to OpenFramework 0.8.0 paths.

This updates the Visual Studio solutions to the new paths for OpenFrameworks 0.8.0 and above. I updated `example-empty` and ran the python script.  For the solutions that used ofxControlPanel (`ofApp.sln` based solutions) I updated those as well.  I also checked that every solution to ensure it compiled and ran.

Each file has minimal changes, there's just lots of files.