Fixed bad NULLs, but nfftls has a complex problem.
Added tag v0.903 for changeset c2dc4b30ec20
Fixed copy_overlap_points
Added tag v0.630 for changeset 489024a7fe1e
Extended copyright notice to 2011
Added tag v0.631 for changeset 2758b6078672
Added arb NW Grnlnd tmsrs from Thomas Jacob.
Added INSTALL file.