Write directly to the socket for Hello and bypass the JSON encoding overhead.
Nicer way to assemble JSON string.
Multi node memcache enabled.

Turned back on some of the memcache optimizations since the updates are
being forced through.
Optimization to allocation of proprietary data.
Closing the socket additional times always is silly, only close it if we panic'd, otherwise it was already closed.
Merge branch 'mcgo' of git://github.com/jrconlin/pushgo
Merge branch 'master' of https://github.com/bbangert/pushgo into mcgo