Fix a couple warnings for PHP 5.2.X

Alias eval commands

Tag 2.2.2

Released v2.2.1 with updated version in php_redis.h

Merge pull request phpredis#156 from Breathless/master

.deb related fixes

version bump after tagging mistake

Version bump to 2.1.1

OBJECT command documentation.

removed dead code.

Added support for UNIX Domain Sockets.