Update Process.php

helper.content_render: Throw exception if no template is valid.
Update View_Alter.php

Entity template: Catch exception of wrong configuration.
Update View_Alter.php

Entity template: On exception, do not print out the error message.
Update at_ui.info

No more require devel.module
Merge branch 'dev-master' of https://github.com/atdrupal/at_base into dev-master