WIP: Make source space code
WIP: Closer to working
WIP: Intermediate
ENH: Better support
STY: Clean a few things
FIX: Addressing comments (mostly xrange)
WIP: (Much) better oct support
FIX: Fix output
opt _complete_surface_info
ENH: OCT works
ENH: Better support
FIX: Fix failing test for now
ENH: Add test for mismatch distance
WIP: Morph subject
ENH: Much faster
ENH: Remove morph and spacing
ENH: More efficient vertex neighbors
ENH: Faster source space creation (from_surf no geom)
STY: Add efficiency comment
ENH: Speed up _tessellate_sphere 2-3x