Added multiple Path.mkdir() when .pfstate, backup, raw and data
directories weren't created.
Adds try-except clause around functions called in init, so that errors
in the early stages are catched to remove already initialized state
files.
Moves filename definitions to tools using global vars.
Removed state.filename = p from main.py introduced when the state
filename was changed.
`self._save()` removed from `PFState` `__init__` as it's not needed. All
setattr already call it.
Luís Murta
51b16c7977
