Convert TensorFlow model

[zchholmes]

To support conversion of different type of TensorFlow models:

• [x] saved model (directory)
• [x] frozen model (.pb)
• [ ] check point model (.ckpt)

[Firyuza]

Hi! After running tensorspacejs_converter for tensorflow frozen model I got an error, can you help to handle with this: ValueError: Unsupported Ops in the model before optimization QueueDequeueManyV2, MaxPoolGrad, Assign, ScalarSummary, ReluGrad, L2Loss, VariableV2, BiasAddGrad, QueueEnqueueV2, TruncatedNormal, PreventGradient, ApplyMomentum, MergeSummary, Multinomial, QueueCloseV2, QueueEnqueueManyV2, AssignAdd, AdjustContrastv2, SparseSoftmaxCrossEntropyWithLogits, RandomStandardNormal, FusedBatchNormGrad, InTopKV2, BroadcastGradientArgs, Conv2DBackpropFilter, QueueSizeV2, RestoreV2, SaveV2, QueueDequeueV2, FIFOQueueV2, PyFunc, DynamicStitch