Add the function of storing camera lens in different folders for one-time batch rendering//增加摄像机镜头一次性批量渲染存放不同文件夹里的功能

非常喜欢BL软件，功能非常棒，但强烈建议在渲染输出的时候，当场景里有多个摄像机需要输出动画序列时能够一次性的批量渲染每个镜头存放在不同的文件夹里的功能。这些都是其他动画软件渲染输出模块的标准基本功能，可是在BL里却不能进行这样的操作， 现有的版本使用起来非常麻烦，必须得一个个相机进行单独设置路径并渲染，必须时刻坐在电脑旁边，很不适用，盼速增加改进！

I like BL software very much, its function is very good, but it is strongly recommended that when rendering output, when there are multiple cameras in the scene that need to output animation sequences, they can render each shot in batches at one time in different folders. These are the standard basic functions of other animation software rendering output modules, but in BL, such operation can not be carried out. The existing version is very troublesome to use. It is necessary to set the path and render separately for each camera. It is necessary to sit beside the computer at all times, which is not applicable. We hope to increase and improve quickly!