官方blender的克隆，包含其子模块
https://projects.blender.org/blender/blender-manual-translations.git 克隆
https://projects.blender.org/blender/blender-assets.git 克隆
https://projects.blender.org/blender/blender-test-data.git 克隆
https://projects.blender.org/blender/blender-developer-docs.git 克隆
https://projects.blender.org/blender/blender-manual.git 克隆