Fix an erb option
Delete DEG_FROM_RAD and RAD_FROM_DEG; Add deg_from_rad() and rad_from_deg()
Add `geodetic_lib.F90', `get_ecef_from_wgs84.F90' and `get_wgs84_from_ecef.F90'
Fix
Rename scale -> N_DIVISION
Add an assersion
Debug
Avoid overwrap