NHibernate.Caches.Memcached updated to use Enyim.Caching.Memcached

Taking up the challenge thrown out in this discussion, http://groups.google.com/group/nhibernate-development/browse_thread/thread/7b6e154b079af7cd, and being sick of fighting versioning conflicts with ICSharp.SharpZipLib, last night I ripped the .Net Memcached.ClientLibrary guts out of NHibernate.Caches.Memcached and replaced them with Enyim.Caching.MemcachedClient (http://github.com/enyim/EnyimMemcached).

I've attached the patch, which can be applied at the NHibernate.Caches level. All tests are passing. I haven't run any tests to see if there's any change in caching performance.

I've also attached the Enyim.Caching.dll that this version is built with.

Note that I put the updated MemCachClient and MemCacheProvider into the NHibernate.Caches.Memcache.Enyim namespace. See App.config in the tests project for an example configuration.