Fix refs in the changelog.
Fix refs in the changelog.

DukeCheng/EnyimMemcachedCore,oceanho/EnyimMemcached,cnblogs/EnyimMemcachedCore,couchbase/EnyimMemcached,haizhixing126/EnyimMemcached,haizhixing126/EnyimMemcached,enyim/EnyimMemcached,DukeCheng/EnyimMemcachedCore,oceanho/EnyimMemcached,cnblogs/EnyimMemcachedCore