[sumo-announce] SUMO Version 1.3.1 hotfix release

[Michael Behrisch <oss@xxxxxxxxxxx>]

Dear friends and users,
due to several bugs in netedit we needed to push out a hotfix
release 1.3.1 which is available now. For more details see below.
The download links are at https://sumo.dlr.de/wiki/Download

For a full list of changes, as always see 
https://sumo.dlr.de/wiki/ChangeLog

===Bugfixes===
* NETEDIT
** Fixed crash when defining vehicle stops. {{Ticket|5963}} (regression 
in 1.3.0)
** Fixed crashing and invalid errors when editing vehicle type 
attributes. {{Ticket|5957}} (regression in 1.3.0)
** Fixed crash after defining flow on unusable edges. {{Ticket|5958}}
** Fixed crash after loading flow with invalid route. {{Ticket|5967}}
** Fixed bug where new vehicles could not be created if trips with a 
specific id already existed. {{Ticket|5969}}
** Fixed invalid application focus after activating checkboxes 
{{Ticket|5966}} (regression in 1.2.0)
** Attribute ''trainType'' for carFollowModel ''Rail'' can now be set. 
{{Ticket|5959}}

* Simulation
** Fixed crash when loading rail signals with long gaps in between. 
{{Ticket|5983}}
** Fixed invalid restrictions on vType parameters. {{Ticket|5991}} 
(regression in 1.3.0)

* NETCONVERT
** Fixed high running time when using edge-removal options with long 
edge lists. {{Ticket|5954}}
** Fixed creation of invalid network after defining invalid splits. 
{{Ticket|5980}}

* DUAROUTER
** Fixed crash on empty vType in input

* TraCI / libsumo
** Function ''vehicle.changeLaneRelative'' is now working with a 
negative lane offset. {{Ticket|5990}}
** several functions were adopted to have the same interface in libsumo 
and the python client, see {{Ticket|5523}}

* Tools
** flowrouter.py can now route vehicles on networks with isolated edges 
and pedestrian structures. {{Ticket|5951}}

===Enhancements===
* NETEDIT
** Added menu option for recomputing routes of trips and flows in demand 
mode (F5) {{Ticket|5978}}

* TraCI / libsumo
** You can now trigger the usage of libsumo instead of TraCI in Python 
by setting the environment variable LIBSUMO_AS_TRACI to any value.

* Tools,
** [[Tools/TraceExporter|traceExporter.py]] now supports conversion of 
fcd-output to KML. {{Ticket|1989}}

===Other===
* Miscellaneous
** Updated SUMOLibraries structure. To build on windows, the libraries 
must be updated as well.
** removed doxygen docu from the distribution

Have fun with the new release,
Laura, Pablo, Jakob, Robert, Melanie, Johannes, Matthias, Michael, 
Yun-Pang
and Angelo