Import bug fixes.
Significant changes in ETL algorithtm:
1. File name collection and loading are separated.
 - The script collects all file urls from FTP.
 - For each region the date in the name is checked against max date in the database.
 - Files are loaded.
2. Notifications ETL temporarily removed.
3. 'inc' now works from any moment - not only in 'daily' folder.
4. 'all' is used ONLY if you want to wipe the db.
5. Corresponding changes in README.md
6. The log now shows file size the script is to load.