Change PHP keywords to comply with PSR2#33

mullikine wants to merge 1 commit intoronnyvdbr:masterronnyvdbr/RaspberryIPCamera:masterfrom

CodeLingoBot:rewrite-ronnyvdbr-raspberryipcamera-psr2-lower-case-constant-valuesCodeLingoBot/RaspberryIPCamera:rewrite-ronnyvdbr-raspberryipcamera-psr2-lower-case-constant-valuesCopy head branch name to clipboard