xmemcached 2.4.4

Main features:

1. Fixed #83 , HealSession may causes too many open files.

xmemcached-2.4.4-bin-with-dependencies.tar.gz

<dependency>
    <groupId>com.googlecode.xmemcached</groupId>
    <artifactId>xmemcached</artifactId>
    <version>2.4.4</version>
</dependency>