Navigation fixes

Small updates to the trajectory navigation in the target and IPA, which improve the agreement with G4.

Release for Snowmass studies

Updated Material intersections and energy loss functions.

Release against KinKal release v1.1.3

Merge pull request #23 from brownd1978/test

Test

v0.2.5

Small improvements.

v0.2.4

Tag after bug fix to Mu2e2 running (target)

v0.2.3

Update nominal Mu2e2 parameters

Update to KinKal changes

Merge pull request #18 from brownd1978/kkconfig

Tweaks

Release for Snowmass studies

Release for snowmass studies

beta release

Beta release for testing and continued development.