PLD: add memcached example, closes #344
PLD: add memcached example, closes #344

GeoODK/onadata,qlands/onadata,piqoni/onadata,hnjamba/onaclone,piqoni/onadata,mainakibui/kobocat,mainakibui/kobocat,smn/onadata,hnjamba/onaclone,GeoODK/onadata,awemulya/fieldsight-kobocat,spatialdev/onadata,sounay/flaminggo-test,jomolinare/kobocat,kobotoolbox/kobocat,spatialdev/onadata,jomolinare/kobocat,hnjamba/onaclone,spatialdev/onadata,awemulya/fieldsight-kobocat,qlands/onadata,jomolinare/kobocat,jomolinare/kobocat,hnjamba/onaclone,qlands/onadata,sounay/flaminggo-test,spatialdev/onadata,piqoni/onadata,sounay/flaminggo-test,mainakibui/kobocat,mainakibui/kobocat,GeoODK/onadata,awemulya/fieldsight-kobocat,smn/onadata,awemulya/fieldsight-kobocat,kobotoolbox/kobocat,GeoODK/onadata,smn/onadata,kobotoolbox/kobocat,kobotoolbox/kobocat,sounay/flaminggo-test,smn/onadata,piqoni/onadata,qlands/onadata