Move RSS for email capability to Starter

Move RSS to email newsletter function to Starter edition. This is far too common a feature to have to move to the Pro tier for. This can be a killer feature for time constrained clients to get them onboard before upselling once they have the basics down.


This feature could be limited to a certain number of feeds, etc but should be included at a starter level to keep up with competition which offers this in most starter editions.