[DLMED] add folder structure

Signed-off-by: Nic Ma <nma@nvidia.com>

Author: Nic-Ma

modules/model_package/spleen_segmentation/commands/export.sh

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+# Description
+A pre-trained model for volumetric (3D) segmentation of the spleen from CT image.
+
+# Model Overview
+This model is trained using the runnerup [1] awarded pipeline of the "Medical Segmentation Decathlon Challenge 2018" using the UNet architecture [2] with 32 training images and 9 validation images.
+
+## Data
+The training dataset is Task09_Spleen.tar from http://medicaldecathlon.com/.
+
+## Training configuration
+The training was performed with command train.sh, which required 12GB-memory GPUs.
+
+Actual Model Input: 96 x 96 x 96
+
+## Input and output formats
+Input: 1 channel CT image
+
+Output: 2 channels: Label 1: spleen; Label 0: everything else
+
+## Scores
+This model achieve the following Dice score on the validation data (our own split from the training dataset):
+
+Mean dice = 0.96
+
+# Disclaimer
+This is an example, not to be used for diagnostic purposes.
+
+# References
+[1] Xia, Yingda, et al. "3D Semi-Supervised Learning with Uncertainty-Aware Multi-View Co-Training." arXiv preprint arXiv:1811.12506 (2018). https://arxiv.org/abs/1811.12506.
+
+[2] Kerfoot E., Clough J., Oksuz I., Lee J., King A.P., Schnabel J.A. (2019) Left-Ventricle Quantification Using Residual U-Net. In: Pop M. et al. (eds) Statistical Atlases and Computational Models of the Heart. Atrial Segmentation and LV Quantification Challenges. STACOM 2018. Lecture Notes in Computer Science, vol 11395. Springer, Cham. https://doi.org/10.1007/978-3-030-12029-0_40

modules/model_package/spleen_segmentation/commands/infer.sh

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+Third Party Licenses
+-----------------------------------------------------------------------
+
+/*********************************************************************/
+i. Medical Segmentation Decathlon
+   http://medicaldecathlon.com/