Merge pull request #1607 from sugizo/fix_memcache_appadmin

appadmin can use ccache with cache.ram = cache.disk = cache.memcache

gluon/contrib/memcache/__init__.py

@@ -21,6 +21,9 @@ def MemcacheClient(*a, **b):
 
 class MemcacheClientObj(Client):
 
+    def initialize(self):
+        pass
+
     meta_storage = {}
     max_time_expire = 24*3600