Ported SolarCollectors from Buildings library

[mwetter]

This closes #1883. The models were merged with

#!/bin/bash
IBP_HOME="xxx/modelica-ibpsa"


# Get list of files to merge
#files=`git diff --name-only origin/master`
files=`find . -type f -name '*' | grep SolarCollectors | grep -v Obsolete`

for ff in ${files}; do
   fil_ibs=`echo ${ff/Buildings/IBPSA}`
   fil_ibs=`echo ${fil_ibs/Buildings_/IBPSA_}`
   ful_ibs="${IBP_HOME}/${fil_ibs}"
   #echo "Test 1 ${ff}"
   if [ "$fil_ibs" != "IBPSA/package.mo" ] && 
      [ -f ${ff} ] &&
      [ "`echo ${ful_ibs} | grep -c compareVars`" == "0" ] &&
      [ "`echo ${ful_ibs} | grep -c funnel_comp`" == "0" ]; then
     # Create directory if it does not exist
     dirNam=`dirname ${ful_ibs}`
     if [ ! -d ${dirNam} ]; then
       mkdir -p ${dirNam}
     fi
     # Replace text and create file
     sed -e 's|Buildings\.|IBPSA\.|g' ${ff} > out.txt
     sed -e 's|IBPSA.HeatTransfer|Modelica.Thermal.HeatTransfer|g' out.txt > out2.txt
     mv out2.txt out.txt
     sed -e 's|Buildings/Resources|IBPSA/Resources|g' out.txt > ${ful_ibs}
     #echo "Test 2 ${ful_ibs}"

   fi

done

Merging them back to Buildings does not cause file changes (other the Buildings/.copiedFiles.txt)

[jelgerjansen]

@mwetter I found two models that referred to models in the Buildings library that don't appear in the IBPSA library. I think that all these models can be replaced by a similar (sometimes identical) model in the MSL. I'll already push the changes to this branch.