Fixed bugs in OptionalColumnTransform and added bool support#4815

Merged

harishsk merged 2 commits intodotnet:masterfrom

harishsk:optionalCol

Feb 10, 2020

Commits on Feb 8, 2020

- Cleaned up OnnxContext's initializer interface
harishsk
committed

Commits on Feb 10, 2020

Fixed doc issues pointed out by code review
harishsk
committed