Adding more properties to style

I am actively contributing [RedBaron](https://github.com/PyCQA/redbaron) project. It has list of formattings for every node [which](https://github.com/PyCQA/redbaron/blob/master/redbaron/base_nodes.py#L12) is [based](https://github.com/PyCQA/redbaron/blob/master/redbaron/nodes.py#L5) on [Baron](https://github.com/PyCQA/baron) [project](https://github.com/PyCQA/baron/blob/master/baron/render.py#L114).

My suggestion is to add more [properties](https://github.com/google/yapf/blob/master/yapf/yapflib/style.py#L45) for every node which can help to distinct style of unique developer. It is useful if developer's style guide is based on some of 4 style guides in Python with minor changes. For instance, some developers like to have one indent (I know that it sounds crazy, but it is just example) instead of two or four.