added compatibility for Predis 1.0
added compatibility for Predis 1.0

doctrine/cache,doktorsitesi/cache,piwik/cache,jenniferyien/cache,Rican7/cache,Tobion/cache,anonpain/cache,jeskew/cache,doktorsitesi/cache,robocoder/cache,guilhermeblanco/cache,robocoder/cache,Ocramius/cache,mpdude/cache