First release of kwb.rabimo. This version tries to simulate exactly what
Abimo 3.3.0 (https://github.com/KWB-R/abimo/releases/tag/v3.3.0) does.
When being applied to the Berlin data (kwb.abimo::abimo_input_2019) there
are remaining maximum differences between intermediate variables calculated
by Abimo and kwb.rabimo, respectively, between about -6% and + 2%. They are
most probably the result of differences in the precision of fractional numbers
and rounding behaviour in C++ and R, respectively.