Auto-generated commit for originally unversioned bundle

SCT commit: dee9497155d08c0c43040234a6ce680892409e5a
SCT commit message:
sct_deepseg_gm implementation (#1564)

Implementation of the `sct_deepseg_gm` API and command-line tool.

Paper reference:
Perone, C. S., Calabrese, E., & Cohen-Adad, J. (2017). Spinal cord gray matter segmentation using deep dilated convolutions. Retrieved from http://arxiv.org/abs/1710.01269

This commit includes the following:

- TensorFlow (1.3.0) and Keras integration into SCT;
- sct_deepseg_gm models support for sct_download_data;
- sct_deepseg_gm API;
- sct_deepseg_gm command-line tool wrapping the API;
- Integration testing for the command-line tool.


Former-commit-id: 43642a54aaf0c43cc8857169fe29158c3e1f09ee

Author: perone

dmri/dmri_T0000.nii.gz

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