Fix and implement supplier counters

lib/qwaiter/counter.rb

@@ -8,15 +8,16 @@ module Qwaiter
     end
 
     def self.get(key)
-      connection.get(key).to_i
+      connection.get(key, quiet: true).to_i
     end
 
-    def self.incr(*args)
-      connection.incr(*args)
+    def self.incr(key, options = {})
+      options[:initial] ||= 0
+      connection.incr(key, options)
     end
 
-    def self.decr(*args)
-      connection.decr(*args)
+    def self.decr(key, options = {})
+      connection.decr(key, options)
     end
   end
 end