Allow ui.xml to include additional xml files to read

Use common portrait and landscape xml files based on resolution
defined by the device.

Change-Id: Iec528f9d846d49857ff98de1ac201e25dbb60339
diff --git a/gui/resources.hpp b/gui/resources.hpp
index bef97dd..874836e 100644
--- a/gui/resources.hpp
+++ b/gui/resources.hpp
@@ -81,6 +81,7 @@
 public:
 	ResourceManager(xml_node<>* resList, ZipArchive* pZip);
 	virtual ~ResourceManager();
+	void LoadResources(xml_node<>* resList, ZipArchive* pZip);
 
 public:
 	Resource* FindResource(std::string name);