Update the standard volume per time units

[lincrosenbach]

Currently the list is:

• "ksm3/d" (thousand std cubic metres/ day)
• "MMscf(60F)/d" (million standard cubic feet/day)
• "MMscf/d" (million standard cubic feet/day)
• "MMscm(15C)/d" (million std cubic metres, 15 degC/day)
• "MMsm3/d" (million std cubic metres/day)
• "MMstb(60F)/d" (million stock tank barrels, 60 deg F/day)
• "MMstb/d" (million stock tank barrels, 60 deg F/day)
• "Mscf(60F)/d" (thousand standard cubic feet/day)
• "Mscf/d" (thousand standard cubic feet/day)
• "Mscm(15C)/d" (thousand std cubic metres, 15 degC/day)
• "Msm3/d" (thousand std cubic metres/day)
• "Mstb(60F)/d" (thousand stock tank barrels,60 deg F/day)
• "Mstb/d" (thousand stock tank barrels, 60 deg F/day)
• "scf(60F)/d" (standard cubic feet/day)
• "scf/d" (standard cubic feet/day)
• "scm(15C)/d" (std cubic metres at 15 deg C/day)
• "scm(15C)/s" (std cubic metres, 15 deg C/second)
• "sm3/d" (std cubic metres/day)
• "sm3/s" (std cubic metres/second)
• "stb(60F)/d" (stock tank barrels, 60 deg F/day)
• "stb/d" (stock tank barrels, 60 deg F/day)

Just one unit has the standard volume per second. Per hour and minute is missing.