Contribute MemcachedStorageService

[Marvin Addison]

> I'll leave that to you, I don't have much experiencing organizing Java
> code.

ack

> Probably ok for now, though if there's a Java memcache server even as a
> toy, that would be nice to add.

I investigated that approach, but I couldn't find much to choose from.
The one that I tried [1] seemed buggy and incomplete. I'm open to
alternatives; speak up if anyone has suggestions.

M

[1] https://code.google.com/p/jmemcache-daemon/