Added memcache storage for expensive mysql queries on home page.  Expires after 2 hours.
Added memcache storage for expensive mysql queries on home page.  Expires after 2 hours.

wilke/MG-RAST,teharrison/MG-RAST,teharrison/MG-RAST,MG-RAST/MG-RAST,teharrison/MG-RAST,teharrison/MG-RAST,wilke/MG-RAST,MG-RAST/MG-RAST,paczian/MG-RAST,wilke/MG-RAST,paczian/MG-RAST,teharrison/MG-RAST,MG-RAST/MG-RAST,paczian/MG-RAST,wilke/MG-RAST,wilke/MG-RAST,teharrison/MG-RAST,MG-RAST/MG-RAST,wilke/MG-RAST,wilke/MG-RAST,paczian/MG-RAST,paczian/MG-RAST,paczian/MG-RAST,MG-RAST/MG-RAST