isochrone class to calculate access sheds, i.e. the area that can be reached within n minutes
added debug code to be able to figure why some edges are traversed to fast (aside fromom u-shaped roads)
Merge pull request #944 from mentaer/master

New isochrone class for OTP Analyst to calculate access sheds, such as walksheds.
Add a script that generates a benchmark plan from a graph rather than GTFS. Formatting fixes too.
PQ can start smaller than |V|.
Lots of comments and stylistic fixes.
Merge remote-tracking branch 'upstream/master'
fix #947
save_the_island_found_by_prune_floating_islands_to_a_csv_file
fix #947
improved_logic_in_the_prune_isolated_islands_considering_islands_with_stops
fix #947
license notice added to subgarph class
Fix test I broke in previous change. Fix some formatting.
Formatting.
Add a convenience constructor to TurnRestriction for use in tests.
Add a unit test that sanity checks edge-based search w/ turn restrictions in the vertex-based graph.
More docs in test.
Don't use deprecated methods in the test.
Merge pull request #948 from benmoovit/master

some improvement for the PruneFloatingIslands model
Merge remote-tracking branch 'upstream/master'