Release Name: v3.0.0

Notes:
Added

• tapas_get_tapas_revision.m outputs the branch and hash of the repository.
• Revision is printed when initiliazing tapas.
• Contributor License Agreement (CLA) file
• CONTRIBUTING.md explaining coding and style guidelines, signing procedure for CLA file
• Include the function tapas_get_current_version.m.
• Implements download of example data from the server using tapas_download_example_data.
• Now there is log file that list the versions of tapas, the download link and the hash of the file that is downloaded.
• Use the an external file to do the md5 check sum. See external javamd5.
• HUGE toolbox: hierarchical unsupervised generative embedding
  https://doi.org/10.1016/j.neuroimage.201...
• rDCM toolbox: Regression dynamic causal modeling
  https://doi.org/10.1016/j.neuroimage.201...
  https://doi.org/10.1016/j.neuroimage.201...

• README.md to include reference to CONTRIBUTING.md and explanation of CLA
• Dropped 4 digits versioning for 3.
• The version of tapas is now read from misc/log_tapas.txt. It is the first line of this file.
• Updated the documentation of SEM.
• Updated SEM to include hierarchical models for inference.
• New version of the HGF toolbox (5.2.0). Details in tapas/HGF/README.md.
• New version of the PhysIO toolbox (R2018.1). Details in tapas/PhysIO/CHANGELOG.md.
• tapas_init.m displays a message to download the data in case the examples directory is not present.
• Update MPDCM for supporting up to cuda 9.0 and openmp.

• Deleted the gpo folder.