Improvements on Matched Distribution
- use EV solver @cortes_c
- unit fix sigma-matrix --> particles @cortes_c
- update of rinit and prinit for tracking @frey_m
- simplify input parameters @frey_m
- bug fix in field interpolation @frey_m @cortes_c
- allow closed orbit calculation only #234 (closed) @frey_m
- update regression test @frey_m
- update OPAL-manual @frey_m
Fixes done in matched-gauss-fixes