move _spline out of the baseline class so it can be used elsewhere
minor fix to class reader for LINE
units: allow fits-standard units m s-1 and km s-1
nospace version
ms/kms compatibility; minor text reformatting
spline orders are limited to 1-4 and cannot be parallelized; therefore,
numcores=1 should just return map(func, obj)
fixes to NH3: fix parameters for 5-5 through 8-8, allow tied (though
mpfit doesn't like it)
cubes: consistency checks in spline fitter
update tests
cubes MUST have access to parallel_map