Fixed Debug builds, SetProperty errors, Fiddling

Fixed old library references for v8 compiled for Debug.
Fixed error handling for JavascriptExternal::SetProperty().
Removed array index setting regression test because it does not make
sense - we copy arrays given to v8 and so changes will not be reflected
in the C# original.
Added Fiddling project for easy debugging.
Auto-convert delegate parameters

Auto-convert delegate parameters in the same way as we do for wrapped
CLI objects.
Merge pull request #10 from oliverbock/master

Fixed Debug builds, SetProperty errors, Fiddling