【Unity】使用Git管理项目及其.gitignore写法
完整的进行Unity 3D源码用Git管理的流程：
1 新建文件夹(路径要求非空)
2 新建U3D项目
3 添加.gitignore文件
获取已有的U3D项目
修改Unity 3D编辑器：
Enable External option in Unity → Preferences → Packages → Repository. (Skip this step in v4.5 and up)
Switch to Visible Meta Files in Edit → Project Settings → Editor → Version Control Mode.
Switch to Force Text in Edit → Project Settings → Editor → Asset Serialization Mode.
Save the scene and project from File menu.
.gitignore：
# =============== #
# Unity generated #
# =============== #
Temp/
Library/
# ===================================== #
# Visual Studio / MonoDevelop generated #
# ===================================== #
ExportedObj/
obj/
*.svd
*.userprefs
/*.csproj
*.pidb
*.suo
/*.sln
*.user
*.unityproj
*.booproj
# ============ #
# OS generated #
# ============ #
.DS_Store
.DS_Store?
._*
.Spotlight-V100
.Trashes
ehthumbs.db
Thumbs.db
