add Thermostatic3WayValvePI.mo
removed duplicate files that are already defined in package.mo file
"final" declaration of controlled parameter
Merge pull request #115 from open-ideas/issue113_userGuideDuplicate

removed duplicate files that are already defined in package.mo file to solve error in loading IDEAS
solved issue where thermostatic3WayValve had a division by zero when the two incoming enthalpies are equal
Merge branch 'issue111_3wayValve' of github.com:open-ideas/IDEAS into issue111_3wayValve

it merges an updated upstream into a topic branch.
added block in PartialSimInfoManager that calculated the environment humidity concentration based on the relative humidity
Merge pull request #119 from open-ideas/issue118_XiAmbCalc

added block in PartialSimInfoManager that calculates the absolute humidity
Make the electricity connection conditional in ventilation, HeatingSystem and Occupant.
add fluid ports to the sturcture.
add basic ventilation systems and None-system for heatingsystem and occupants.
correct/update Buildings/Examples/Structure.mo structure.mo
update occupants for new conditional electrical load.
add system to building. Add IDEAS/Interfaces/Examples/building.mo
Forgotten package commit for None heating system.
add nEmb to dummy building. Add prescribed heatflow to heatPorts.
Merge remote-tracking branch 'remotes/upstream/Interface' into issue108_HeatingSystems

Conflicts:
	IDEAS/Buildings/Examples/Structure.mo
	IDEAS/Interfaces/BaseClasses/HeatingSystem.mo
	IDEAS/Interfaces/BaseClasses/Structure.mo
	IDEAS/Interfaces/BaseClasses/VentilationSystem.mo
	IDEAS/Interfaces/Building.mo
	IDEAS/VentilationSystems/Examples.mo
	IDEAS/VentilationSystems/Ideal.mo
	IDEAS/VentilationSystems/none.mo
Merge remote-tracking branch 'remotes/upstream/issue111_3wayValve' into issue108_HeatingSystems

Conflicts:
	IDEAS/Fluid/Valves/Thermostatic3WayValve.mo
fix the Thermostatic3WayValve.mo to remove non physical factor in the k-equation.
update all heatingSystems examples. All systems are running.