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
Merge pull request #123 from open-ideas/issue123_lumpedVolDecZone

added lumpedVolumeDeclarations and changed TOpStart to convective T_start