Added CMS_STRING_EXPANDER.

For now with basic implementation.
  It will be improved later

Added SEO related attribute in CMS_RESPONSE.
Added improved Contact module.
Added basic SEO module.

modules/node/site/files/scss/node.scss

@@ -3,22 +3,17 @@ ul.cms-nodes {
 	list-style-type: none;
 	padding: 3px 3px 3px 3px;
 	border: solid 1px #ccc;
-
 	li{
 		border-top: dotted 1px #ccc;
 		&:first-child {
 			border-top: none;
 		}
 	}
-
 	li.cms_type_page a::before {
 		content: "[page] ";
 	}
-
 	li.cms_type_blog a::before {
 		content: "[blog] ";
 	}
-
-
 }