Issue #1547390 by Jeremy: cleanup admin wstats overview page.
Issue #2259103 by beejeebus: Set cache->created with microtime(), not time().
Issue #2278021 by totosarg, Jeremy: lighten memcache version warning.
Issue #1863996, improve tests.
Issue #2280219: handle misconfiguration without fatal error.
Issue #2279969: add troubleshooting tips for common installation errors.
Merge tag '7.x-1.2' of git://drupalcode.org/project/memcache