metatag 7.x-1.0-alpha4

Changes since 7.x-1.0-alpha3:

• #1323692: Fixed do not use the [user:picture:url] token for og:image default if user pictures are not enabled.
• Add translatable flag to the {metatag_config} table.
• #1344284: Fixed the {metatag_config}.cid column should not be NULL.
• #1281624: Merged metatag_ui.module back into metatag.module.
• Removed warning not to use module in production from header.
• #1343914: Added support for the
  meta tag for Google+ integration.
• #1313550: Module is not using the proper HTML tag theme function inside the meta tag theme functions.
• #1304038: Fixed the generator tag cannot be disabled.
• #129664: Fixed summary for robots meta tag did not display and caused a PHP warning with htmlspecialchars().
• #1298752: Fixed PHP notice undefined variable instance in metatag_field_attach_rename_bundle().
• #1299028: Fixed export library not included in metatag_config_cache_clear().
• Ensure decode_entities() is run prior to strip_tags().