Save the model id rather than the index within the block as this would give an...

Save the model id rather than the index within the block as this would give an incorrect id when using more than one block.

pcigale/managers/models.py

@@ -81,7 +81,7 @@ class ModelsManager(object):
         table = Table(np.vstack((self.fluxes, self.properties)).T,
                       names=self.obs.bands + self.propertiesnames)
 
-        table.add_column(Column(np.arange(len(table)), name='id'), index=0)
+        table.add_column(Column(self.block, name='id'), index=0)
 
         table.write("out/{}.fits".format(filename))
         table.write("out/{}.txt".format(filename), format='ascii.fixed_width',