[Proj] Analyzing the bumps in the EGM2008 geoid

[Charles Karney]

I should have included the definition I used for spherical harmonics
(since different definitions are used in different fields).  I use the
DLMF definition given in

   http://dlmf.nist.gov/14.30.E1
   http://dlmf.nist.gov/14.30.E3