Tests: Add neural network training tests for #13.
Tests: Add neural network training tests for #13.

nhzandi/openface,Alexx-G/openface,nhzandi/openface,nmabhi/Webface,francisleunggie/openface,xinfang/face-recognize,nmabhi/Webface,cmusatyalab/openface,nmabhi/Webface,cmusatyalab/openface,Alexx-G/openface,xinfang/face-recognize,nhzandi/openface,Alexx-G/openface,Alexx-G/openface,xinfang/face-recognize,nmabhi/Webface,cmusatyalab/openface,francisleunggie/openface,francisleunggie/openface