fix "Using 'name' in TextSymbolizer is deprecated" warning
prereq update for Debian/wheezy, and don't hardcode $USER anymore
renderer.py works now with both mapnik and mapnik2 libraries
add options to renderer.py

Options added are: --mapfile, --outfile, --view
add --geometry option;
don't import * from mapnik
renderer.py: new option --bbox
comments how to use renderer.py
better howto