Version 0.53 of libmemcached released

[Brian Aker]

Hi!

* Fix for FreeBSD/OpenBSD and -lm  
* Added memcached_exist()
* Fix for memory when using config test.  
* CLI gained --quiet

http://libmemcached.org/

Blog post on memcached_exist()  ->  http://blog.krow.net/post/10549707127

Cheers,
        -Brian