Beta Version 0.5.0

Changes

• Renamed backPropagate() function to backwardPropagate() function for Sequential and ComputationalGraph Containers.

• Renamed backPropagateGenerator() function to backwardPropagateGenerator() function for GenerativeAdversarialBaseModel.

• Renamed backPropagateDiscriminator() function to backwardPropagateDiscriminator() function for GenerativeAdversarialBaseModel.

• Some internal changes was made to fit the needs of the function above.