fixed typo and reference in Heatsource_HP_BW
added example for HeatPump_BrineWater
minor fix in HP_brinewater
removed obsolete parameter Tinitial from Pipe_Heatport
added an interface component for turning components on or off using a realinput OR parameter
added a new partial for heat pumps, a on/off heat pump model and 3 datasets for this type of heat pump