TransitConfigGroup can now store the filename of the vehicles file to be used.
Removed convex hull creation - not always a polygon.
bugfix live snapshots work again
... ups forgotten to commit
a lot of otf related stuff
more preparations for the datapuls data
made class serializable so it can be used in mvis
several changes to shelters and risk reducing evacuation
many structural changes in retailers package
some preparations for the datapuls data
