Notification class can now be taken from official repository again
fix page title on message to freelancer page
Changes to Messages table:

* Relationshipped client_id, from & to
* Renamed from -> from_id, to -> to_id
* Removed title, no point if we're not gonna use it
* Message to TEXT, overcomes 255 character limit
* dropped from_read, it's always yes.
* renamed to_read to unread, changed to boolean, defaulting to true

(And yes, changing migrations after they're being used is a bad idea)
Forward user to health profile after sending a message
Show messages on health profile

Closes #13 Closes #14