add settings to beautifier

src/beautifiers/phpcbf.coffee

@@ -14,6 +14,8 @@ module.exports = class PHPCBF extends Beautifier
         if (standard) then \
           standard else "PEAR"
       ]
+      phpcbf_path: (phpcbf_path) -> phpcbf_path or @which('phpcbf')
+      
     PHP: true
   }