added new app playgrounds
added model of playgrounds
added json2geo.json script and copy school app code to playground app ;)
added json2geo.json script and resulting geo.json formated playgrounds
customize load_playground_data
improved json2geojson.py and geo.json file (local_traffic key)
created the loader for playgrounds, connected with /api-url, all other except local_traffic works fine, added loader to makefile
fixed model for stops and lines
added some libs to requirements
Delete json2geo.json
Delete load_school_data.py
- removed json2geojson script - not necessary anymore
- removed PyYAML because only json2geojson needed it
- deleted json2geojson
- added model for playgrounds
	modified:   project/playgrounds/management/commands/load_playground_data.py
	modified:   project/playgrounds/models.py
	modified:   requirements/base.txt
Added equipment model, halved json file
Delete .project
Merge pull request #5 from CodeforLeipzig/rene

Approved and Merged. Thanks for your help!