Load additional fonts from the ~/.config/grafx2/fonts directory
Load in fact from the /fonts/ subdirectory of the config directory, wherever it is (it depends a lot on the platform) under WIN32 it is %APPDATA%/GrafX2/fonts MacOS ~/Library/Preferences/com.googlecode.grafx2/fonts etc. see http://pulkomandy.tk/projects/GrafX2/ticket/56
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