Config directory is not taken from XDG_DATA_HOME

[filmil]

Wingo doesn't respect setting XDG_DATA_HOME, although wingo --help claims that it does. See below for details.

$ XDG_DATA_HOME=$HOME/code/go/src/github.com/BurntSushi/wingo wingo --replace
WINGO WARNING: config_theme_setters.go:179: Could not get font data from '/usr/share/fonts/TTF/DejaVuSansMono-Bold.ttf' because: open /usr/share/fonts/TTF/DejaVuSansMono-Bold.ttf: no such file or directory
WINGO WARNING: config_theme_setters.go:167: Could not load './data/minimize.png' as a png image because: open ./data/minimize.png: no such file or directory
WINGO WARNING: config_theme_setters.go:167: Could not load './data/minimize.png' as a png image because: open ./data/minimize.png: no such file or directory
WINGO WARNING: config_theme_setters.go:167: Could not load './data/close.png' as a png image because: open ./data/close.png: no such file or directory
WINGO WARNING: config_theme_setters.go:167: Could not load './data/close.png' as a png image because: open ./data/close.png: no such file or directory
WINGO WARNING: config_theme_setters.go:167: Could not load './data/maximize.png' as a png image because: open ./data/maximize.png: no such file or directory
WINGO WARNING: config_theme_setters.go:167: Could not load './data/maximize.png' as a png image because: open ./data/maximize.png: no such file or directory
WINGO WARNING: config_theme_setters.go:179: Could not get font data from '/usr/share/fonts/TTF/DejaVuSansMono-Bold.ttf' because: open /usr/share/fonts/TTF/DejaVuSansMono-Bold.ttf: no such file or directory
WINGO WARNING: config_theme_setters.go:179: Could not get font data from '/usr/share/fonts/TTF/DejaVuSansMono.ttf' because: open /usr/share/fonts/TTF/DejaVuSansMono.ttf: no such file or directory
WINGO WARNING: config_theme_setters.go:167: Could not load './data/wingo.png' as a png image because: open ./data/wingo.png: no such file or directory
[09:12:57] fmil@fmil:~