0.9.1

This is the first release in over 2 years. Several features have been removed
because we did not have the capacity to maintain them properly.

The following features have been removed / changed:

• JPSFire support / toxicity analysis has been removed
• Parallel execution with OpenMP has been removed
• TraVisTo support has been removed.
• Automatic geometry correction has been removed
• Support for periodic geometries, i.e. cylinder worlds and torus worlds, has
  been removed
• Trajectories can now only be exported in txt format
• Only 'Global Shortest Path' and 'Floorfield
  Shortest Path' routers remain
• Only 'Velocity' and 'GCFM' models remain
• Trajectories are no longer split into multiple files
• All vtk output has been removed
• Progressbar display has been removed
• Logging to file has been removed, all log messages are written to stdout
• Changed output behaviour: When running jpscore all output will now be copied to
  <current-working-directory>/results before the simulation starts and the
  trajectory file will be written to this location progressively.

New experimental feature:

• Simulating Trains

jpsvis is now released from the same source code repository as jpscore and will
track the same version.

Changes affecting jpsvis

• jpsvis can now load multiple GB trajectory files within seconds.
• jpsvis UI reworked to be single window
• Frames can be move forward / backward with LEFT / RIGHT keys
• Speed up can be increased / decreased with UP / DOWN keys
• Playback can be started / stopped with SPACE