SDD: Enhance SDD for SizingSystem

Added support for several new SDD properties that control the OpenStudio
SizingSystem object:

DsgnAirFlowMin
DsgnPrehtTemp
DsgnPrehtHumidityRat
DsgnPreclTemp
DsgnPreclHumidityRat
SizingOption
ClgFullOutsdAir
HtgFullOutsdAir
ClgDsgnHumidityRat
HtgDsgnHumidityRat
SDD: Fix unit conversion in tower translation

There was an invalid unit conversion in variable tower water flowrate.
Incorrectly translating gal to m^3 instead of gpm to m^3/s
SDD: Add option to enable IP tabular output
Merge branch 'develop' of https://github.com/NREL/OpenStudio into develop