Added "querySaveMetaInfos" to MetaEngine.

-> Allows easy addition of save state specific infos like playtime, save date atc.
 -> Removed MetaEngine::loadThumbnailFromSlot, superseded by meta infos
 -> Changed SCUMM / KYRA to implement the newly added functionallity
 -> Removed hack in KYRAs listSavefiles, which is now handled via meta infos

svn-id: r34581

graphics/surface.cpp

@@ -66,6 +66,11 @@ void Surface::free() {
 	bytesPerPixel = 0;
 }
 
+void Surface::copyFrom(const Surface &surf) {
+	create(surf.w, surf.h, surf.bytesPerPixel);
+	memcpy(pixels, surf.pixels, h * pitch);
+}
+
 void Surface::hLine(int x, int y, int x2, uint32 color) {
 	// Clipping
 	if (y < 0 || y >= h)