Initial commit to add fgpanel to cmake build system

Most likely only works on OSX, other OSes will follow later

utils/CMakeLists.txt

@@ -5,3 +5,7 @@ add_subdirectory(GPSsmooth)
 if (FLTK_FOUND)
     add_subdirectory(fgadmin)
 endif (FLTK_FOUND)
+
+if (WITH_FGPANEL)
+    add_subdirectory(fgpanel)
+endif (WITH_FGPANEL)

utils/fgpanel/CMakeLists.txt

@@ -0,0 +1,25 @@
+#FIXME: does this work in *nix/windows?
+find_package(png REQUIRED)
+find_package(OpenGL REQUIRED)
+find_package(glut REQUIRED)
+
+add_executable(fgpanel main.cxx
+	FGGLApplication.cxx 
+	FGPanelApplication.cxx 
+	FGPNGTextureLoader.cxx 
+	FGRGBTextureLoader.cxx 
+	FGPanelProtocol.cxx
+	FGFontCache.cxx
+	panel.cxx 
+	panel_io.cxx)
+
+target_link_libraries(fgpanel 
+	${PNG_LIBRARIES}
+	${GLUT_LIBRARIES}
+	${SIMGEAR_LIBRARIES}
+	${OPENGL_LIBRARIES}
+	${ZLIB_LIBRARIES}
+	${PLIB_LIBRARIES}
+	)
+
+install(TARGETS fgpanel RUNTIME DESTINATION bin)