Change logo

src/assets/logo_ascii.png

src/assets/logo_ascii.svg

src/assets/logo_ascii.xbm

src/assets/logo_csv.png

src/assets/logo_csv.svg

src/assets/logo_csv.xbm

src/assets/logo_spectra.png

src/assets/logo_spectra.svg

src/assets/logo_spectra.xbm

src/assets/logo_stamp.png

src/assets/logo_stamp.svg

src/assets/logo_stamp.xbm

src/assets/logo_vo.png

src/assets/logo_vo.svg

src/assets/logo_vo.xbm