Example script to download map tiles.

This standalone script requires tributary which is a data processing and analysis library for Python.

tributary can be found at: https://github.com/eliquious/tributary

1. Create new virtualenv (run virtualenv env)
2. Activate virtual env (source env/bin/activate)
3. Clone tributary library from GitHub
4. Install tributary dependencies from inside checkout directory (pip install -e . -r test-requirements.txt)
5. Install requests (pip install requests)
6. Run downloader from tributary-maps directory. (python scripts/lldl.py)

Currently, there are no command line options (although it would be trivial to add them). The map URL, central lat/lon and zoom levels are hardcoded.