Change-Id: I746c4a6ce31a0997ba7fe5495673cce3cf9268c3
ORIGINAL_AUTHOR=Thai Duong <thaidn@google.com>

GitOrigin-RevId: 96f59160d45ca3aba9b23061ddf7df1aca862376

XyzFactory.getPrimitive.

Change-Id: I1aa66133234643f1c7d657b30abe2b0575b62599
ORIGINAL_AUTHOR=Thai Duong <thaidn@google.com>

GitOrigin-RevId: 0c6ceee9509c664a1ecb5edcc330dad9e02d1aee

- Directory structure follows TensorFlow.
- Rules for protobuf building are based on https://github.com/pubref/rules_protobuf, as I can't find anything simpler.
- Continuous integration with Kokoro (work in progress).

I also copied some existing Java/CC code from Bartosz and Daniel's experimental folders.

Change-Id: I7f993934d149c114320e3388fee84fbdafd7ba81