Issue #2329437 by Jeremy: Update documentation to explain that configuration...

Issue #2329437 by Jeremy: Update documentation to explain that configuration of servers and bins is optional.

README.txt

@@ -30,8 +30,11 @@ is important.
  3. Put your site into offline mode.
  4. Download and install the memcache module.
  5. If you have previously been running the memcache module, run update.php.
- 6. Edit settings.php to configure the servers, clusters and bins that memcache
-    is supposed to use.
+ 6. Optionally edit settings.php to configure the servers, clusters and bins
+    for memcache to use. If you skip this step the Drupal module will attempt to
+    talk to the memcache server on port 11211 on the local host, storing all
+    data in a single bin. This is sufficient for most smaller, single-server
+    installations.
  7. Edit settings.php to make memcache the default cache class, for example:
       $conf['cache_backends'][] = 'sites/all/modules/memcache/memcache.inc';
       $conf['cache_default_class'] = 'MemCacheDrupal';