Add SetpointManagerWarmest.
Add UpdateHVACLibrary.rb file

UpdateHVACLibrary.rb is a simple Ruby script to version translate the
file located at openstudiocore/src/openstudio_app/Resources/hvaclibrary/.
Update SDD translator to support the SZVAV tag.

When AirSys elements have the SZVAVAC or SZVAVHP type, they will be
translated with a SetpointManagerWarmest and a VAV terminal regardless
of the specified air terminal type.

Generally the SDD will define an uncontrolled terminal for SZVAV, but we have
determined that the most appropriate modeling strategy is to use a
reheat terminal.
Merge remote-tracking branch 'origin/develop' into 48116285-SZVAV

Relsoved Conflicts in openstudiocore/src/openstudio_app/Resources/hvaclibrary/hvac_library.osm
Add tests for SetpointManagerWarmest.
Merge pull request #417 from NREL/48116285-SZVAV

48116285 szvav [delivers #48116285]