Changes from Version 0.27.0 to Version 0.27.1

Release date: 27.07.2016

### Bugfixes

- netconvert
  - Original IDs are no longer lost when splitting edges. #2497
  - Elevation data is now correctly imported from OpenDRIVE networks. #2239

- netedit
  - Fixed crash when increasing the number of lanes by setting numLanes. #2505
  - Fixed slow loading of large networks.
  - Custom colors for selected junctions and edges are now working. #2386

- duarouter
  - Fixed crash when using option --ignore-error with invalid `via`-edges. #2494

### Enhancements

- Simulation
  - Added new option save-state.period <TIME> to save simulation state periodically. #2441
  - Added new option save-state.suffix <STRING> to determine the suffix of saved state files. The default is .sbx which saves in a binary format. Alternatively, .xml may be used which makes the state files human-readable.

- netconvert
  - Networks exported to OpenDRIVE now use parametric curves to represent smooth geometry in place of straight-line segments. #2041
  - Networks exported to OpenDRIVE now contain elevation data. #2240
  - Parametric curves as specified in OpenDRIVE version 1.4 can now be imported. #2478
  - Revised default OpenDRIVE typemap. Now imports additional lane types such as tram and rail. #2492
  - Added new option osm.layer-elevation <FLOAT> to import implicit elevation data from OSM-layering information.
  - Networks imported from OpenDRIVE now contain edge type information based on the OpenDRIVE lane types. #2509

- sumo-gui
  - Added Visualization options for drawing intersections with exaggerated size and disable edge drawing based on custom widths. #2140
  - Added Visualization option for indicating the driving direction of lanes. #2180
  - Added Visualization option for drawing sublane boundaries
  - Lanes can now be colored according to the number of vehicles that are delayed from entering the network. #2489

- netedit
  - Added Visualization options for drawing intersections with exaggerated size and disable edge drawing based on custom widths. #2140
  - Added Visualization option for indicating the driving direction of lanes. #2180

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