Changelog:
- new set key {columns <exact no of columns>}
- new set key {keywidth <exact width>}
- added XDG startup file $XDG_CONFIG_HOME/gnuplot/gnuplotrc
- added XDG history file $XDG_STATE_HOME/gnuplot_history
- added XDG config $XDG_CONFIG_HOME/gnuplot/gnuplot-wxt.conf
- bugfixes
- full changelog