Spymemcached 2.8.10+ Has SASL Bugs That Prevent Auth To Popular Memcached Providers. Reverting to 2.8.9

* https://code.google.com/p/spymemcached/issues/detail?id=272
* Issue also affects memcachier (used with Heroku, Cloudbees, other popular PaaS providers).
Merge pull request #20 from nsiemens/patch-1

Spymemcached 2.8.10+ Has SASL Bugs That Prevent Auth To Popular Memcache...