BUGFIX: 'title' attribute of form elements was not translating

Added 'title' to $translatableAttributes of Zend/Form/View/Helper/AbstractHelper.

    php run-tests.php Form

on commit 3a650b3455715d9464598653e915940f4f6905c4 fails w/ error

    Class 'Locale' not found in /home/nsv/dvl/zf2/library/Zend/I18n/Validator/Float.php on line 65
 
so i cannot test my change, but it works in my job project.

P.S. Oops, sorry for cross-branch and mixing w/ other's commit, don't know how to fix.