add support for TGraphErrors
bugfix: crash when run without a file
rename property ratio_thnf -> thnf
update tests for latest rename
simplify cloning
tried to improve color handling for legends again
fix outdated documentation
improvements to handling changes in fontsizes
move text-object selection to its own function
split axis config for x and y
allow for manual and automatic management of margins
increase default font-size
add function to set y axis on canvas directly
use visible markers
add parameter to set draw_option