logintoboggan 5.x-1.2

Changes since DRUPAL-5--1-1:

• #204600 by hunmonk: theme_lt_username_title can not be overwritten in template.php. replace all hardcoded theme calls with proper calls to theme().
• #221652: preserve query string in logintoboggan_destination().
• clean up validation problems with users changing their username/email to another user's username/email when login w/ email is enabled.
• exclude anon user in matching email validation check.
• #215999 by hunmonk: Login on Access Denied resets itself when module listing page is submitted and there is a module dependency for logintoboggan.
• #215981 by jbc, hunmonk: add INSTALL.txt, clarify login block setting location.