Merge branch 'V23_new_survey' into 'V23'

use new PA31-4.0 starting coords

See merge request !60

tests/templates/madx_survey.template

@@ -28,8 +28,8 @@ phi_survey    = 0.0 ;
 psi_survey    = 0.0 ;
 
 theta_0  = theta_survey ;
-lat_ref  = 46.246799 ;  
-lon_ref  = 6.097867 ;
+lat_ref  = 46.246815 ;  
+lon_ref  = 6.097854 ;
 alt_ref  = 202.0 ;