remove useless method
move qgis writer in separate utils class
small changes
doc
rename script
DI is now the only way to go, so no need to have it in the name
Revert r33188 "do not try to identify joint trips as trips"
this crashes because interactions have no location, and I considered latter that this kind of dependency between packages was not that terrible as a first step...
bugfix and improvement in safety
test code for gunnar. i haven't quite got it yet.
clean dependencies of utils package
