Fix typo in getSponsorFromLinkName (key_name variable name instead of sponsor_key_name). Add deleteSponsor function for deleting Sponsor entities from datastore.

Style fix, as requested by Todd to dict usage Use "dict['key'] = value" instead of "dict.update({'key' : 'value'})" when updating only one key.

Call soc.logic.site.map.getDjangoUrlPatterns() to construct the urlpatterns from the site map, rather than explicitly listing them in app/urls.py. Patch by: Todd Larsen Review by: to-be-reviewed