Qsiprep

This release adds some rather big updates to QSIPrep.
* FSL is updated to version 6.0.3
* CUDA v9.1 support is added to the image (works with GPUS in Docker and Singularity)
* A new robust b=0 masking algorithm is introduced.

* Improved handling of Freesurfer path (50)
* Better logic in commandline argument checking (50, 62)
* More robust brain masking for b=0 reference images (73)
* Bugfix for reverse phase encoding direction dwi series (68)
* Bugfix for warping eddy's CNR output (72)

* IMPORTANT: commandline call changed to use official BIDS App
* eddy will use multiple cores if available
* Fixed bug in sentry interaction

* Bugfix: masking was not working on eddy.
* Bugfix: static versioning was not working in the container.
* New graphics in the documentation.
* Use BSpline Interpolation if --output-resolution is higher than the input resolution.

An issue was discovered in how voxel orientation interacts with TOPUP/eddy and outside
fieldmaps. Unless everything is in LAS+ prior to going into TOPUP/eddy, the warps are
incorrectly applied at the end of eddy. This resulted in fieldmap unwarping reports that
looked good but a final output that is bizarrely warped. Additionally, GRE fieldmaps would
result in outputs being under-unwarped. To fix all of these, TOPUP (if PEPOLAR fieldmaps are
being used) and eddy occur in LAS+, then their outputs are converted to LPS+ for GRE fieldmaps,
SyN. The rest of the pipeline happens in LPS+, like the SHORELine version.

* Update installation method to match fMRIPrep
* Add CI tests for reconstruction workflows
* Make the ``--sloppy`` option affect the reconstruction workflows
* Fixes bug in 3dSHORE reconstruction (incorrect scaling)
* CRITICAL bug fix: convert everything to LAS+ if eddy is going to be used
* Added built-in reconstruction workflows
* Added Brainnetome, AICHA and the remaining Schaefer atlases

* Address issues in Nipype causing random crashes