用于 Cocos Creator 的 box2D testbed

将官方的 box2D Testbed 移植到 Cocos Creator 中

Name		Name	Last commit message	Last commit date
Latest commit History 6 Commits
assets		assets
settings		settings
.gitignore		.gitignore
LICENSE		LICENSE
README.md		README.md
creator.d.ts		creator.d.ts
jsconfig.json		jsconfig.json
project.json		project.json
tsconfig.json		tsconfig.json

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