Add title lines to `outside_points;csv`

Inst_eddies/Tests/examine_eddy.f90

@@ -195,6 +195,8 @@ program examine_eddy
 
   call new_unit(unit)
   open(unit, file = "outside_points.csv", status = "replace", action = "write")
+  write(unit, fmt = *) '"degrees east" "degrees north"'
+  write(unit, fmt = *) "longitude latitude"
 
   do i = 1, n1 + n2
      write(unit, fmt = *) outside_points(:, i) * rad_to_deg