Improvements of R backend of Cantor

by Олексій Протас for KDE

The emerging of Cantor made available the long awaited compromise software which would combine modern GUI technology with the power of CLI. Unfortunately, due to project being relatively young, the R language backend is not as well developed as the other ones are. R happens to be a swiss knife suite for many scientific research labs. Having a friendly GUI for R would therefore provide a nice premise for spreading KDE and free software in general across the scientific institutions.