Sign Reading controller

User side :

• Preferred should be a separate method
• Add a route for preferred
• Remove the additional path for viewing an entry
• Remove Add edit delete methods

Admin side :

• Create the sign readings controller
• If copying over Add edit delete methods from user, make sure to remove arbitrary limits in proveniences, periods, etc.
• Make sure to add the appropriate forms to add edit and delete comments but in the sign readings controller and forms
• Remove the sign readings comments controller