brook90r: Run the LWF-BROOK90 hydrological model from within R

The R-package brook90r features most of the functionality of the original MS Access-UI of LWF-Brook90. Everything works as intended and is fully documented.
The central function of the package writes input files from model control options, parameters, soil and climate data, starts the external model code LWF-BROOK90 and returns its output files. Additionally, submodels for defining vegetation dynamics and pedotransfer functions for deriving soil hydraulic parameters are provided.