* Fix C# log APIs. Fixes github issue #3409.
* Fix build error due to accidental duplication of GraphOptimizationLevel
* Fix runoptions
* Fix broken test. Add --blame switch to dotnet test cmd line to print the failed test in case of crash.
- Support bool-Tensor and int8-Tensor in input-output of C# api
- Support string-tensor as input in C# api
- Fix a bug in InferenceSession.Run() -- RunOptions was not passed into the native call