Add Mnist examples (Simple and CNN)#2

Merged

karllessard merged 7 commits intomasterfrom

Apr 7, 2020

Commits on Feb 25, 2020

Migrating MNISTTest out of org.tensorflow.training.
Craigacp
committed

Commits on Mar 4, 2020

First draft for a MNIST example
karllessard
committed

Commits on Mar 5, 2020

Commits on Mar 18, 2020

Update code with new API
karllessard
committed

Commits on Mar 29, 2020

Adapt to latest op changes
karllessard
committed

Commits on Apr 7, 2020

Adapt to latest changes in TF Java
karllessard
committed