Merge branch 'timmermanns' into 'master'

src/test/resources/target_code/CNNPredictor_Alexnet.h

...sources/target_code/CNNPredictor_CifarClassifierNetwork.h

src/test/resources/target_code/CNNPredictor_VGG16.h

src/test/resources/target_code/execute_Alexnet

...test/resources/target_code/execute_CifarClassifierNetwork

src/test/resources/target_code/execute_VGG16

src/test/resources/valid_tests/Alexnet_alt.cnna

src/test/resources/valid_tests/Alexnet_alt2.cnna

src/test/resources/valid_tests/ArgumentSequenceTest.cnna

src/test/resources/valid_tests/CifarClassifierNetwork.cnna

src/test/resources/valid_tests/Fixed_Alexnet.cnna

src/test/resources/valid_tests/Fixed_ThreeInputCNN_M14.cnna

src/test/resources/valid_tests/MultipleOutputs.cnna

src/test/resources/valid_tests/ResNeXt50_InstanceTest.cnna

src/test/resources/valid_tests/ResNeXt50_alt.cnna

src/test/resources/valid_tests/ResNet152_alt.cnna

src/test/resources/valid_tests/SimpleNetworkLinear.cnna

src/test/resources/valid_tests/SimpleNetworkRelu.cnna

src/test/resources/valid_tests/SimpleNetworkSigmoid.cnna

src/test/resources/valid_tests/SimpleNetworkSoftmax.cnna