Global Added Opcache improvements by namespacing php core's functions (@Geolim4) Updated contributing.md + added coding guideline (@Geolim4) Fixed little notice (@Geolim4) Drivers Added UNIX socket support for (P)Redis and Memcache(d) as requested in #563 (@Geolim4) Helpers Updated test helper and API to add the git version (if available) (@Geolim4) Tests Fixed #560 // Potential delay issue in test (@Geolim4)