Improved documentation and expanded assignment.
Small editorial revisions
Moved declaration.

Moved declaration of compositeWall due to a bug in Dymola 2015 FD01
beta1.
Reverted replaceable change.

The replaceable keyword is needed in Dymola 2015 to allow assigning the
record from the GUI.
Added replaceable keyword.

This is need to assign data from the GUI through the pull down menu.
Avoided replaceable parameters

This simplifies the implementation by avoiding replaceable parameters
where they are not needed.