Merge pull request #205 from wagnert/master

Remove unnecessary dependency to ratchet because its already in websocke...
Merge pull request #206 from wagnert/master

Switch to new memcached server v1.4.20 + back to OpenSSL 1.0.0m
Merge pull request #207 from wagnert/master

Change download URL for memcached server
Merge pull request #208 from wagnert/master

Add latest version of example application