Patch to the auto-generated C# Collada code, because of a mono bug reported here:
https://bugzilla.xamarin.com/show_bug.cgi?id=25474
The auto-generated code runs fine in Windows .Net but crashes in mono for some Collada files.
Merge pull request #17 from diva/master

Patch to the auto-generated C# Collada code, because of a mono bug