**New features:** - Possibility to freeze a subset of particles coordinates during tracking - pip installation works without -e
0.3.0
**New features:** - .copy method for Particles and BeamElement objects - Generation of backtracking elements for basic elements - Generation of backtracker from tracker - Added new aperture shapes (LimitRectEllipse and LimitPolygon) - Introduced LossLocationRefinement
0.2.4
**Bugfix:** - Memory leak in particles monitor
0.2.3
**Bugfix:** - Solved issue in ``Particles.set_particle``
**Added example:** - Direct check against SixTrack
0.2.2
**New feature** - Introduced random number generator accessible inside kernels
0.2.1
**New features:** - Use non-aligned objects in tracker instances, aligned objects elsewhere - Use get_test_contexts from xobjects