update twitter bootstrap and fontawesome
improve forms template
fix output formats
fix loading config file
Merge branch 'master' into integration

Conflicts:
	app/translations/messages.en.yml
	app/translations/messages.fr.yml
	app/views/datalea/config_file_form.html.twig
	app/views/datalea/generate.html.twig
	src/Spyrit/Datalea/Form/Type/ConfigFileType.php