CLuaInstVideo: Add setSinglePlay()

- When setSinglePlay() Neutrino returns after playing a movie
   immediately in the tv/radio modus back
 - Set Lua api version to 1.29

Example:
	video = video.new()
	video.setSinglePlay()
	video.PlayFile(...)

src/gui/lua/lua_video.h

@@ -23,7 +23,8 @@
 class CLuaVideo
 {
 	public:
-		CLuaVideo() {};
+		bool singlePlay;
+		CLuaVideo() { singlePlay=false; };
 		~CLuaVideo() {};
 };
 
@@ -55,6 +56,7 @@ class CLuaInstVideo
 		static int channelRezap(lua_State *L);
 		static int createChannelIDfromUrl(lua_State *L);
 		static int getNeutrinoMode(lua_State *L);
+		static int setSinglePlay(lua_State *L);
 		static int VideoDelete(lua_State *L);
 
 		static void videoFunctionDeprecated(lua_State *L, std::string oldFunc);