Fixes expiration date issue
Ref. Issue #96 (https://github.com/enyim/EnyimMemcached/issues/96)

Signed-off-by: Rob Mayer <rmayer@stewartstrategy.com>
Merge branch 'master' of https://github.com/couchbase/couchbase-net-client into ECB-changes

Conflicts:
	lib/EnyimMemcached