Merge pull request #1 from dforsi/master

Correzione di alcuni errori di battitura e aggiunta di .gitignore
Create regional file just once
Save stats on first run

Fix bug reported by Marco Braida
Create directories if missing
Fix other missing directories and files
Check if gpx exists before parsing
Create only necessary OSM files (+ cleanup)

Regional files were created also when they were not necessary.
Bug reported  by Daniele Forsi
Remove temporary files
Update README.md