Allow user to suppress warning on dynamic components

[microprediction]

Line 729 of dlm.py reads:

if len(self.builder.dynamicComponents) > 0:
print('Remember to append the new features for the' +
' dynamic components as well')

I'm going to suggest allowing suppression of this, as there isn't a way to add the data to 'main' and also dynamic at the same time - so this message will always be displayed, often in an inner loop.