Added support for 'stats reset' command

[gflarity]

It's possible to reset stats in memcache by sending 'stats reset\r\n'. This works with your client but the response wasn't being checked for and as result callbacks weren't firing afterwards. The fix is only a couple of lines. Please pull.

Cheers, Geoff

[elbart]

hi Geoff,

thanks for your help. Will try to review it this week and add a test for that case.

regards,

tim