Fixed initialization of the "secure" option

When the "option.secure" is set to "false", the check "options && options.secure || Cookies.defaults.secure" returns the default value instead of "false"

cookies.js

@@ -36,7 +36,7 @@
             path: options && options.path || Cookies.defaults.path,
             domain: options && options.domain || Cookies.defaults.domain,
             expires: options && options.expires || Cookies.defaults.expires,
-            secure: options && options.secure || Cookies.defaults.secure
+            secure: (options && typeof options.secure !== undefined) ? o.secure : Cookies.defaults.secure
         };
 
         switch (typeof options.expires) {