added T_start parameters in Building components
fixed issue with not default insulationThickness causing error in ZoneExample
added lumpedVolumeDeclarations
removed TOpStart
propagated mixing volume properties
set connections to mixing volume such that flow 'noFlowReversal' is possible
set T_start for heat capacitor in zone model to be consistent with T_start in mixingVolume
added log change in package.mo that TOpStart is removed
Made number of ports in mixingvolume dependant on allowFlowReversal. This prevents wrong enthalpies from being calculated when the flow is being reversed.
corrected typo in allowFlowReversal declaration in zone
added T_start change that was forgotten in MonoLayerOpaqueNf
removed some heatPort T_start values
changed T_start in components into a scalar instead of a vector
various consistency fixes
remove non-physical equation for k-factor of Thermostatic3WayValve.mo and replace it by a non-event boundary for the enthalpy.
removed thermostatic3WayValvePi
changes to thermostatic3wayvalve:
outlet enthalpy setpoint is calculated using more correct arguments
changed default valve leakage values
changed description of a variable
Merge pull request #123 from open-ideas/issue123_lumpedVolDecZone

added lumpedVolumeDeclarations and changed TOpStart to convective T_start
Merge pull request #121 from open-ideas/issue120_TstartBuilding

added T_start parameters in Building components
Merge pull request #112 from open-ideas/issue111_3wayValve

Changes to thermostatic3wayValve. A discontinuous change in "k" (i.e. a "Unbounded help variable for determining fraction of each flow") is still reported, but accepted.
Merge pull request #124 from open-ideas/Interface

Interfaces updated based on fluid-ports and conditional electrical plugs. The current Merge will give conflicts when pulling ```issue51_BESTEST``` into ```Annex60```, but these will be handled then.
Update Zone.mo

Added outer Modelica.Fluid.System system in building zone
updated ZoneExample: two zones and no m_flow boundary
Merge branch 'Annex60' of github.com:open-ideas/IDEAS into Annex60