Renamed ags to rs (regionalschlüssel)
Added primary keys to childtables
Changed geometry to multipolygon
Renamed ags to rs in commuter_*.cvs to reflect changes in DB
Added post-import script to commuter import
Added Zensus2011 shape files and import script
Merge branch 'master' of
https://github.com/boerngen-schmidt/commuter-simulation.git

Conflicts:
	data/commuter/commuter_gemeinden.csv
	data/commuter/commuter_kreise.csv