warn user when over max walk distance

[novalis]

[from whuber]

There should be an alert saying why it is being suggesting that you walk further than the stipulated max walking distance. For instance: "No trips were found that met your criteria. Consider the following other options" or something like that.

[novalis]

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This ticket has been referenced in ticket #353:

''...h constant edge weights (per mode). This can be implemented in conjunction with #306 and #359.

This also suggests that all components of weight (e.g. turn costs)...''

--andrewbyrd

[novalis]

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This ticket has been referenced in ticket #353:

''...d (temporarily) to a hard limit, pending a more elegant fix to be combined with #306 and #359.''

--andrewbyrd

[novalis]

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This ticket has been referenced in ticket #371:

''... limit in AStar. They should be handled more intelligently, in conjunction with #306 and #359.''

--andrewbyrd

[abyrd]

Itinerary objects now have a public boolean walkLimitExceeded field, so it's just up to clients to interpret this field and warn the user. Closing.