Manpages of gcu-bin in Debian buster

• gchem3d-0.14(1)
• gchem3d(1)
• gchemcalc-0.14(1)
• gchemcalc(1)
• gchemtable-0.14(1)
• gchemtable(1)
• gspectrum-0.14(1)
• gspectrum(1)