Add formatDisplayField() and columnType() methods to CrudViewHelper.
Add formatDisplayField() and columnType() methods to CrudViewHelper.

This allows easier overriding and better control over generated output.

FriendsOfCake/crud-view,Phillaf/crud-view,FriendsOfCake/crud-view,Phillaf/crud-view,FriendsOfCake/crud-view