starting COE state equations from McInnes... not running yet.
Finished writing classical orbital element equations of motion, conversion functions, and example. Integrates. Still need to verify.
Added cartesian & KS 3D examples to compare with COE, which works
Changed LAAN to LAN. Removed references & calculations of t0 in KS state & EOM.
Added spinor example. Finding discrepancy with KS.
Fixed error in energy function for cartesian states - 3D Kepler motion examples now in agreement