`docstrings.yml` contains non-ASCII characters and `config.py` may fail to read it

[srhouyu]

When the default system encoding is not UTF-8 ( My Windows is GBK ), config.py will fail to read docstrings.yml.

discoart/discoart/config.py

Line 173 in 6bd664f

with open(os.path.join(__resources_path__, 'docstrings.yml')) as ymlfile:

I think encoding='utf8' can be added to open().