replaced old IDEAS smoothmin and smoothmax functions by Annex60 counterparts
removed 'parameter' from 'replaceable parameter' in a few models, which caused warnings
added hydraulic diameter in EmbeddedPipe's flow resistance
fixed issue where building zones were using a fixed medium
removed final specifier from use_dh in pipetwoport for being able to use dh in embeddedpipe
split off A_floor for floor heating and tabs
updated RadiantSlabChar.mo and NakedTabs.mo according to new parameter A_floor in embeddedpipe
Merge branch 'Annex60' into issue50_Afloor

Conflicts:
	IDEAS/Buildings/Components/Zone.mo
Merge branch 'Annex60' into issue50_Afloor
correct hydraulic diameter
Merge branch 'issue50_Afloor' of github.com:open-ideas/IDEAS into issue50_Afloor
Merge branch 'Annex60' into issue50_Afloor

Conflicts:
	IDEAS/Buildings/Components/Zone.mo
added pressure drop implementation for EmbeddedPipe.mo
added bend pressure drop to EmbeddedPipe
added example of pressure drop
added mos file for embeddedpipe
changes to embeddedpipe:
- made 2 minor changes in calculation of pressure drop
- A_floor no longer has a default value to avoid mistakes
- changed example accordingly
modified unit test script according to new buildingspy implementation: no longer ignoring html errors
added referencer esults for new unit test: EmbeddedPipeDp
Merge branch 'issue50_Afloor' into Annex60

Conflicts:
	IDEAS/Fluid/HeatExchangers/Examples/package.order
accepted annex60 changing reference results that have minor deviations