fixed issue with fov and mm_per_vox
Added nimsfs and server tabs
Removed a useless line of code
Switch to single-thread with no lock-- 50% faster
Option to specify max # of recon jobs (hard-coded)
Better handling of rds refscan files
Method to infer dataset's nimsdata-parseable file
Pass the correct slice-order to physio
Many changes for nimsdata refactor and bug fixes

More changes to push along the nimsdata refactoring. I'm also fixing
various bugs and weaknesses. Highlights: the nifti slice order field
should now be set correctly, physio regressors will use this correct
timing, and the bvecs are rotated by the image rotation matrix. Lots of
other little details were (hopefully) fixed or at least improved along
the way. NOTE: there were a lot of changes, so there are likely some
regressions in here. We need more testing!