Finalization of HLNUG Reports

## New Features

- Proper session client with cookies for restapi queries
- Option for overwriting/skipping existing reports
- More debugging and script prints during run
- Less warnings should appear now

## Bug Fixes

- Handling of empty district information
- Handling of NaNs in volume calculation
- Handling of empty road names
- Handling of empty structure strings
- Handling of empty or zero length values in HLNUG Data
- Missing translations are now passed through
- Now also check correct data type for plotting osm streets