* Initial checking for CSharp GPU support
* Enabled C# for GPU build
* Update Onnxruntime to Ort
* Add runtime check for cuda dlls for windows
* Update pretrained model test, for models where name!=model.onnx
* lowered tolerance for float checks to pass new models
* ignore extra ._resnet34v2.onnx file in pretrained test
Applies to all public headers and macros, plus many internal ones. There are still some internal things with OnnxRuntime in the name, but this fixes all public functions & macros.
