Minor fix for a memcached lookup error via sentry.
-SSLv3 for POODLE attack
Keep old splash site content in cache longer
Merge branch 'interim_splash_site' into global_tags
First draft of global tags.

Currently, there is no discovery mechanism for the global tags.

Also lacking:
   * Proper formatting on tag list page
   * "Nearby tags" when viewing a tag on a particular region
   * Links from search page (global search)