routeSampler.py: allow additional route restriction

[namdre]

Additional hard counts

• [x] attribute for number of departures on edge
• [x] attribute for number of arrivals on edge

Maximum counts: In contrast to the hard counts, there is no penalty for staying below the maximum but the value may not be exceeded. (useful for avoiding jams due to infeasible volume on edges without measurements). It should possible to set a default maximum flow per lane via options.

• [ ] attribute for maximum flow on edge or edgeRelation
• [ ] attribute for maximum number of departures on edge
• [ ] attribute for maximum number of arrivals on edge

Minimum counts: In contrast to the hard counts, there is no penalty for going above the minimum but the value must be reached.

• [ ] attribute for minimum flow on edge or edgeRelation
• [ ] attribute for minimum number of departures on edge
• [ ] attribute for minimum number of arrivals on edge

[namdre]

idea: we could permit python range notation in the data attributes:

• count="x": min=x and max=x (current behavior)
• count="x:y": min=x and max=y
• count="x:" min=x
• count=":x" max=x

this would avoid the need for a lot of extra attributes and should be quite readable