remove code, class names and paths from translation strings.

Follow up on https://github.com/cakephp/cakephp/pull/1532 and https://github.com/cakephp/cakephp/pull/1526 .

Paths, Classes and their methods should not be part of the translation. It only creates a risk of misspelling them. Also, changing those should not necessarily have to affect the translation itself.

Also unifies methods - having () appended.