Generating configs on Windows has some broken folders due to forward slashes

It seems like using `os.getcwd()` on windows causes the config to look like this:

```
# Directories to load user modules from
# e.g. /path/to/my/modules
extra = [ 'c:\Users\Bekey\Desktop\buffy/modules/' ]
```

which then causes issues because it tries to escape the first character of every folder.
