Make IDD changes required to support VRF systems.
Merge remote-tracking branch 'origin/develop' into 37281647-VRF
Add AirConditionerVariableRefrigerantFlow.

This is a partial implementation.  More details will be added in future
commits.
Merge remote-tracking branch 'origin/develop' into 37281647-VRF
Merge remote-tracking branch 'origin/develop' into 37281647-VRF
Develop AirConditionerVariableRefrigerantFlow.
Add CoilCoolingDXVariableRefrigerantFlow
Add CoilHeatingDXVariableRefrigerantFlow.
Merge remote-tracking branch 'ORNL/AddModelObjectList' into 37281647-VRF
Develop Model objects related to VRF
Add osm->idf translator functions for VRF systems.
Merge branch 'develop' into RefrigerationPart2
Add 6 new refrigeration components to OpenStudio.idd

Adds these 6 new components:
Refrigeration:Condenser:EvaporativeCooled
Refrigeration:Condenser:WaterCooled
Refrigeration:Condenser:Cascade
Refrigeration:Subcooler
Refrigeration:SecondarySystem
Refrigeration:WalkIn
Update implementations of new Refrigeration objects

This updates the implementations of RefrigerationSecondarySystem,
RefrigerationWalkIn, and RefrigerationSystem. This also allows the
first two of those objects to be built.

Adds object to OpenStudio.idd for the Refrigeration:WalkIn, adding
Refrigeration:WalkIn:ZoneBoundary. This is due to WalkIn requiring 12
fields for each extensible group.
Merge branch 'develop' into RefrigerationPart2

Conflicts:
	openstudiocore/src/model/CMakeLists.txt
	openstudiocore/src/model/ConcreteModelObjects.hpp
	openstudiocore/src/model/Model.cpp
	openstudiocore/src/model/ScheduleTypeRegistry.cpp
Fix merge conflicts
Fix build errors

This fixes build errors in RefrigerationSecondarySystem and
RefrigerationSystem.
Add RefrigerationWalkInZoneBoundary and more updates

Adds RefrigerationWalkInZoneBoundary to hold data for
RefrigerationWalkIn extensible group. Add methods to
RefrigerationWalkIn to [add,remove,removeAll]ZoneBoundary.
Add ForwardTranslator...[SecondarySystem,WalkIn]

Adds ForwardTranslatorRefrigerationSecondarySystem and
ForwardTranslatorRefrigerationWalkIn.

Updates ForwardTranslatorRefrigerationSystem.
Update SecondarySystem, add unit test, and more

Adds unit tests for RefrigerationSecondarySystem.

Updates RefrigerationSecondarySystem to add remove(), clone(),
children(), and constructor

Updates RefrigerationSystem cpp and unit tests for new refrigeration
objects.