New models

[unclassy]

Hi Cheesy,

I've uploaded the last version where I added a plane model.
As I wrote in the fork, I've deleted all non relevant files and kept only MoreModels.c, Common.h and the new props.
I didn't include the .sln/.vcxproj files to avoid modifying your external references. You'll have to add the new props .c files to the project.

I'm not adding any other new model by the moment. You can merge the project.

Let me know if everything is ok.