Make sure all the variables are saved in the FITS and not just the ones with...

Make sure all the variables are saved in the FITS and not just the ones with are in mass_proportional_info. Bug seen by Yannick 2Eagle Eye' Roehlly.

pcigale/sed/io/fits.py

@@ -22,10 +22,11 @@ def save_sed_to_fits(sed, prefix, norm=1.):
 
     """
     info = OrderedDict()
-    for name in sed.mass_proportional_info:
-        info[name] = str(norm * sed.info[name])
-    else:
-        info[name] = str(sed.info[name])
+    for name in sed.info:
+        if name in sed.mass_proportional_info:
+            info[name] = str(norm * sed.info[name])
+        else:
+            info[name] = str(sed.info[name])
 
     table = Table(meta=info)
     table['wavelength'] = Column(sed.wavelength_grid, unit="nm")