Fix for IE6 bug involving question mark in hash.

If a question mark appears in a URL fragment, IE6 will exclude the
question mark and everything after it from `window.location.hash`.  For
example, given the location:

    http://example.com/#/docs?page=1&per_page=10

The value of `window.location.hash` will be:

    #/docs

By bypassing `window.location.hash` and parsing the URL within Sammy to
extract the fragment we can avoid cross-browser inconsistencies like
this one.

lib/sammy.js

@@ -606,7 +606,15 @@
     // Override this and <tt>setLocation()</tt> to detach the app from the 
     // window.location object.
     getLocation: function() {
-      return this.clone(window.location).hash.toString();
+      // Bypass the `window.location.hash` attribute.  If a question mark
+      // appears in the hash IE6 will strip it and all of the following
+      // characters from `window.location.hash`.
+      var matches = window.location.toString().match(/^[^#]*(#.+)$/);
+      if (matches) {
+          return matches[1];
+      } else {
+          return '';
+      }
     },
 
     // The default behavior is to set the current window's location.