Update README with regex URL base examples.

README

@@ -102,15 +102,16 @@ Generate stand-alone output (suitable for inclusion in a mail, for example)::
 A log file with requests for 2 websites for which individual stats are
 desired, and hits outside those base urls are ignored::
 
-  apachedex --base /site1 /site2
+  apachedex --base "/site1(/|$|\?)" "/site2(/|$|\?)"
 
 A log file with a site section to ignore. Order does not matter::
 
-  apachedex --skip-base /ignored --default website
+  apachedex --skip-base "/ignored(/|$|\?)" --default website
 
 A mix of both above examples. Order matters !::
 
-  apachedex --skip-base /site1/ignored --base /site1 /site2
+  apachedex --skip-base "/site1/ignored(/|$|\?)"
+  --base "/site1(/|$|\?)" "/site2(/|$|\?)"
 
 Notes
 =====