Fabricators.localPath should read subdirectories

Currently the `localPath` fabricator ignores any subdirectories. These shall be read in recursively.

A directory structure like the following:
```
mdDir
  + - subdir
  |   | 10.md
  |   + - subsubdir
  |   |   | 20.md
  | 00.md
  | 01.md   
```

Should yield fabrics named like (given `mdDir` was given as path):

- `00.md`
- `01.md`
- `subdir/10.md`
- `subdir/subsubdir/20.md`