Multi node memcache enabled.

Turned back on some of the memcache optimizations since the updates are
being forced through.
Merge branch 'master' of https://github.com/bbangert/pushgo into mcgo
typo fix
Move no_whitespace as class method
Remove additional go routines, let flush run immediately.
nil pointer this...
Explicitly allocate items/expired.
Avoid passing a reference.
Stop if we get no records back from getMulti.
Merge branch 'mcgo' of git://github.com/jrconlin/pushgo