from ChangeLog:

2017-02-20  John Chapman  <John.Chapman@cern.ch>

        * CMakeLists.txt - add explicit dependency on boost. To be
        understood why this is necessary. ATLASSIM-3234
        * tagging TrkG4UserActions-04-00-01

2016-12-09  John Chapman  <John.Chapman@cern.ch>

        * src/components/TrkG4UserActions_entries.cxx,
        src/GeantFollower.cxx, src/GeantFollowerMS.cxx,
        src/EnergyLossRecorder.cxx, src/MaterialStepRecorder.cxx,
        TrkG4UserActions/EnergyLossRecorder.h,
        TrkG4UserActions/MaterialStepRecorder.h,
        TrkG4UserActions/GeantFollower.h,
        TrkG4UserActions/GeantFollowerMS.h - removal of V1 UserAction
        implementations and tidying of V2 UserAction implementations.
        * tagging TrkG4UserActions-04-00-00

2016-12-09  John Chapman  <John.Chapman@cern.ch>

        * Merging the V2 UserAction implmementations from
        TrkG4UserActions-02-00-03-03 into the trunk.
        * tagging TrkG4UserActions-03-00-00


Former-commit-id: dd408c22b20a61a5bd675eea750045a088d421b4