Make VS2013 look inside include/cef folder for headers

indra/cmake/CEFPlugin.cmake

@@ -9,6 +9,7 @@ else (USESYSTEMLIBS)
     use_prebuilt_binary(cef)
     set(CEFPLUGIN ON CACHE BOOL
         "CEFPLUGIN support for the llplugin/llmedia test apps.")
+        set(CEF_INCLUDE_DIR ${LIBS_PREBUILT_DIR}/include/cef)
 endif (USESYSTEMLIBS)
 
 if (WINDOWS)

indra/media_plugins/cef/CMakeLists.txt

@@ -24,6 +24,7 @@ include_directories(
     ${LLIMAGE_INCLUDE_DIRS}
     ${LLRENDER_INCLUDE_DIRS}
     ${LLWINDOW_INCLUDE_DIRS}
+    ${CEF_INCLUDE_DIR}
 )
 include_directories(SYSTEM
     ${LLCOMMON_SYSTEM_INCLUDE_DIRS}