Examples Project v0.2.1 for UE4.17

Changes
-Updated Tensorflow Plugin to 0.4.1
-Cleaned up mnist examples
-Added basic tensorflow example: adding float arrays
-Save/load example now listens for ShouldRetrain on the TensorFlowComponent
-Documentation updates

Dependency tensorflow-ue4 plugin version
Version 0.4.1
Download this release and drag it into your project folder:
https://github.com/getnamo/tensorflow-ue4/releases/tag/0.4.1