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Merge branch 'nz' into levelDetail
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Merge branch 'nz' of https://github.com/yby415098820/nz into levelDetail

Conflicts:
	app/levelDetail/LevelDetailLayer.lua
	app/scenes/MainScene.lua
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Revert "no message"

This reverts commit 02863e575030a32fc16dfd03525a39f55ee6ab35.
Merge branch 'nz' into levelDetail

Conflicts:
	app/levelDetail/LevelDetailLayer.lua
	app/scenes/MainScene.lua
Merge branch 'nz' of https://github.com/yby415098820/nz into levelDetail
Merge branch 'nz' into levelDetail

Conflicts:
	app/levelDetail/LevelDetailLayer.lua
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合并nz完毕，可正常运行。
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程序初步优化
优化代码逻辑结构。