Convert to .NET Standard 2.0.#75

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schungx wants to merge 4 commits intostemarie:masterfrom

Commits on Mar 10, 2018

Convert to .NET Standard 2.0.
schungx
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Commits on Mar 11, 2018

Remove fields that don't make sense in .NET Standard.
schungx
committed

Commits on Mar 21, 2018

Fix bug - make sure partition keys are all the same in a single table batch upload.
schungx
committed

Commits on Mar 22, 2018

Make sure partition keys are the same BEFORE adding to batch operation.
schungx
committed