* Fix for non-wide characters in strings for linux - for c#-native interop
* update some unit tests
* added unicode and utf-8 encoding explicitly for file names
* Minor updates to exception message
* update models folder to new location
* update copy to preservenewest
* reenable pretrained test
* added some debugging info for build
* update pretrained test, and tensor proto definition
* 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
* Added tests for C# types
* added multithread c# test
* Added pretrained tests
* Added function to load data from PB file
* added exec task for protoc
