Xcoll release 0.2.0

What's Changed

• Merge all developments by @freddieknets in #3
• Renamed part_hit_pos etc by @freddieknets in #4
• Feature/aperture model check and temporary patch by @giadarol in #15
• Everest collimator natively in xobjects C API, pencil initial conditions, and loss map functionality by @freddieknets in #16
• Added dispersion by @natriant in #17
• Avoid backtrack through collimators by @giadarol in #18
• Pencil beam now includes the difference between a converging and a diverging collimator by @freddieknets in #19
• Temporary workaround for InvalidCollimator as a backtracker. by @gbrogginess in #20
• Release 0.2.0 by @freddieknets in #21

New Contributors

• @natriant made their first contribution in #17
• @gbrogginess made their first contribution in #20

Full Changelog: v0.1.1...v0.2.0