v2.1.1

Fix import issues.

v2.1

• Only the default classifier is available.
• The classifier no longer throws the Initializer block1_conv1_bn/keras_learning_phase:0 appears in graph inputs and will not be treated as constant value/weight. etc. warning.
• It only works on images.
• The classifier is included in the project itself.
• Only the v2 model is available (the original repo's default). So v2 from original is main here.