update submodule references
backported autoloader fix; updated submodule references
Merge branch '1.5/develop' into 1.5/master
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
Updated framework to 1.5.3