972110 swimming pool

Changes and additions needed to model indoor swimming pools; this work is ready for review
@RKStrand @Myoldmopar @kbenne These units are invalid.  Needs to be "W/(m3/s)" then add a 
\note Power per unit of pool water flow.
Noticed this when IDF Editor complained while working on a different issue.  Should get this fixed before making the performance update build.  This  happens frequently (IDD errors) - we need an IDD validation step in the CI system.  Noting this here and will post a fix shortly.