* Allow sharing of initializers between sessions.
* Allow sharing of initializers between sessions (2).
* Add test for C#
* Add test for C#; address PR comments
* Address PR comments
Moved AddInitializer logic to internal session options
Added tests for owned buffer
Clarified documentation
Fix bug where memory info and not device was getting compared
* Fix test
* Fix training build
* Add ver 5 end marker and ver 6 starter, add scenario and usage examples.
* Validate input shapes.
* Cache some input def metadata
* Make some methods const and check for negative values of dims instead of just -1.
* Fix shape inferencing test.
* Fix testLabelEncoder test
* Fix more tests
* Fix more tests
* Use size_t for loop variable
