CLuaInstVideo: Add getNeutrinoMode()

- Set Lua api version to 1.28

Example:
	video = video.new()
	if video.getNeutrinoMode() == NMODE.TS then
		messagebox.exec{title="Attention!", text="Movie player is busy.", buttons={ "ok" } }
	end

src/gui/lua/lua_video.h

@@ -54,6 +54,7 @@ class CLuaInstVideo
 		static int zapitStopPlayBack(lua_State *L);
 		static int channelRezap(lua_State *L);
 		static int createChannelIDfromUrl(lua_State *L);
+		static int getNeutrinoMode(lua_State *L);
 		static int VideoDelete(lua_State *L);
 
 		static void videoFunctionDeprecated(lua_State *L, std::string oldFunc);