Rescue from error caused by invalid recipient address.
Fix typo in 'place_id' attribute in place message form.
Customize message sent via place details contact form.
Respond with 500 status when message cannot be sent.
Enable spec for sending valid place form data.
Rename spec file to place_message_spec.rb.
Extract place messaging into module.

+ Create message data hash in PlaceMessage model.
Re-use recipient name stored in message.
Rename place message attribute to "sender_email".
Rename place message attribute to "sender_name".
Rename place message attribute to "recipient_email".
Fix spec for place message model.
Simplify spec for sending place messages.

+ Parameter "place_id" is not a natural member of the "place_form" object.
Extend spec for sending place messages.
Merge branch 'feature/place-details-contact-message-197'