Reset google api for metabox map
Merge branch 'master' of https://github.com/extralagence/extra

* 'master' of https://github.com/extralagence/extra:
  Minor updates
  The responsive menu is now a plugin. Use it with new ExtraResponsiveMenu();
  Updated extra checkbox
  Updated the slider field in metabox to include default value and minimum value
  Better handling of wp title hook
  Group should use title instead of label