message: Added shared weights for MatMul
diff: @@ -1228,8 +1228,18 @@ void TFImporter::parseNode(const tensorflow::NodeDef& layer_)
  int kernel_blob_index = -1;
  const tensorflow::TensorProto& kernelTensor = getConstBlob(layer, value_id, -1, &kernel_blob_index);
  + const String kernelTensorName = layer.input(kernel_blob_index);
  + std::map<String, Mat>::iterator sharedWeightsIt = sharedWeights.find(kernelTensorName);
  + if (sharedWeightsIt == sharedWeights.end())
  + {
  blobFromTensor(kernelTensor, layerParams.blobs[0]);
  releaseTensor(const_cast<tensorflow::TensorProto*>(&kernelTensor));
  + sharedWeights[kernelTensorName] = layerParams.blobs[0];
  + }
  + else
  + {
  + layerParams.blobs[0] = sharedWeightsIt->second;
  + }
  if (kernel_blob_index == 1) { // In this case output is computed by x*W formula - W should be transposed
  Mat data = layerParams.blobs[0].t();
  