update submodules
updated submodule reference for the 1.5.1. hotfix
update submodule references
update submodule references
backported autoloader fix; updated submodule references
Merge branch '1.5/develop' into 1.5/master
customization
title
user form
always validate email address uniqueness
unique email validation
logout
correct use of hybrid controller
moved security settings back to app. related fuel/docs#526

Conflicts:
	fuel/app/config/config.php
Merge branch '1.5/develop' of https://github.com/fuel/fuel into 1.5/develop
backported default app/config/config.php from 1.6/develop
backported default app/config/config.php from 1.6/develop
update subreferences
Merge branch '1.5/develop' into 1.5/master
Merge branch '1.5/master' of github.com:fuel/fuel