worked on CRM-12321, added memcache support for civicrm_cache table
CRM-12321 - CRM_Core_BAO_Cache::setItem - Cache coherency
CRM-12321 - CRM_Core_BAO_Cache - Clear static caches when setting items
CRM-12321 - CRM_Core_BAO_Cache - Clear statics when flushing system caches
Merge pull request #1053 from totten/pull-request-1029-patches

CRM-12321 - SQL/Memcache coherency