Initial commit

pull the latest dev from  date_facets of git.drupal.org and then,
add other patches from the community
fix: Undefined index in _date_facets_api_facet_create_label

Apply the patch written by joseph.olstad
from https://drupal.org/node/2220227

Signed-off-by: Sangwook Lee <aladdin@plusgenie.com>