WIP: Add mapping
WIP ENH: Better coverage of necessary functions
ENH: Better method naming
FIX: Fix reading of normals for BEM
WIP ENH: Better performance
FIX: Fix silly dot error
FIX: Fix simple test
FIX: Multiple suggested fixes
ENH: Use LUT for Legendre
WIP ENH: Closer to working
ENH: Field lines work
FIX+ENH: Fix n_jobs, add mode option
FIX: np 1.6 req
ENH: Dont require trans unless critical
FIX: Fix surface normals
FIX: Fix test
avoid some lists, fix typo in test + s/ctype/ch_type
FIX: Better coverage and coordinate frames