Edit .gitignore to capture sipa/config.py
Edit .gitignore to capture sipa/config.py

Since, after the rewriting of the history, the config has been
removed, adding the latter to the .gitignore is just consequent.

MarauderXtreme/sipa,agdsn/sipa,fgrsnau/sipa,MarauderXtreme/sipa,lukasjuhrich/sipa,agdsn/sipa,agdsn/sipa,fgrsnau/sipa,lukasjuhrich/sipa,agdsn/sipa,MarauderXtreme/sipa,fgrsnau/sipa,lukasjuhrich/sipa,lukasjuhrich/sipa