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.
Rename fontello.inc to at_fontello.inc.
Change structure of at_icon. Use Icon class to render tag.
Update spyc revision.
Use at_fn, at_fake in fontawesome test.
Merge branch 'dev-master' of https://github.com/atdrupal/at_base into icon