Added splashs2 and splash3.

[NEW] Added splashs2 and splash3. But they are not actual images would
display in the future and are the same as splash1.
Moved game initialization codes from SceneTitle to SceneNewGame.

[MOD] Moved game initialization codes from SceneTitle to SceneNewGame.
Added F5 to start the game immedately.

[NEW] Added F5 to start the game immedately in debug mode.
[FIX] Fixed the missing dispose when interrupt SceneTitle.