v4.3.0

• gratefully merged Adrian Böckenkamp's (CodeFinder2) fork upstream into rtv/Stage.
• fixed corrupted strings in GUI bug
• fixed ranger visualizations bug (only showed up on some platform/driver combos)
• build/install changes to play nicely with ROS (for the Lunar release of stage_ros)

v4.2.1

• add 'confirm_on_quit' option to world section to skip confirmation dialog on exit
• add continuous integration support by Travis CI
• fix segfault in ranger visualization
• fix segfault in blockgroup.cc:236 (gluTessEndPolygon()) when model size (x,y,z) is 0.0
• minor UI improvments (allow changing Stage's caption, allow centering the window)
• add ability to load worlds/models from std::istream for more flexibility
• fix compiler errors in debug build
• make odom integration error publicly accessible (see rtv#67)
• don't crash/segfault in ctrl/wander when there's only 1 range sensor (see rtv#59)
• fix errors reported by the most recent gcc 6.3.1 (on Debian 9 SID), rtv#63 in particular
• improve/unify coding style (strip trailing spaces, use clang-format)
• fix compiler error reported with strict flags (-Wall -Wextra -pedantic -Werror)
• fix issues reported by cppcheck v1.72
• minor updates in docs (cosmetics, make comments visible in doxygen)

v4.1.1

• fixed bugs in libstageplugin/p_ranger.cc that prevented the plugin from building
• updated some docs

v4.1.0

• many bugfixes
• support for basic dynamics: position models simulate acceleration
  and have a new acceleration control mode.
• visualization options can be loaded from and saved to worldfiles
• API change: new World::Run() methed provides the same interface to
  GUI and non-GUI worlds (by chmp@github)
• saved screenshots are numbered with leading zeros for convenience
  when using movie-making tools (by mani-monaj@github)
• major performance enhancement: position updates now run in parallel
  with sensor updates, using a double-buffer-style alternating pair of
  occupancy grids
• several minor performance enhancements
• much faster debug visualization (occupancy grid and voxel views)
• build scripts are more portable

v4.0.1

• Bugfixes
• more sparing use of memory to support very large worlds (square kms!)

v4.0.0

Major new release since worldfile syntax and API have both changed due
to a new unified ranger model. Laser model is now deprecated in favour
of the ranger. This follows a similar change in Player 3, where laser
interface support was deprecated but still in place due to lack of
Stage support. This release fixes that.

Also includes many bugfixes, a much improved build system and some
performance enhancements and documentation improvements.