Various improvements to HRB examples

git-svn-id: https://thermopower.svn.sourceforge.net/svnroot/thermopower/trunk@217 80daafeb-7430-0410-91d5-8b30b0bbd841
Deleted LiquidWaterConstant medium model, which is largely incomplete and does not support setState_xx functions

git-svn-id: https://thermopower.svn.sourceforge.net/svnroot/thermopower/trunk@218 80daafeb-7430-0410-91d5-8b30b0bbd841
Added package icon

git-svn-id: https://thermopower.svn.sourceforge.net/svnroot/thermopower/trunk@219 80daafeb-7430-0410-91d5-8b30b0bbd841
Further improvements to HRB example

git-svn-id: https://thermopower.svn.sourceforge.net/svnroot/thermopower/trunk@220 80daafeb-7430-0410-91d5-8b30b0bbd841
Restructuring of test models

git-svn-id: https://thermopower.svn.sourceforge.net/svnroot/thermopower/trunk@221 80daafeb-7430-0410-91d5-8b30b0bbd841
Started upgrade of RankineCycle example

git-svn-id: https://thermopower.svn.sourceforge.net/svnroot/thermopower/trunk@222 80daafeb-7430-0410-91d5-8b30b0bbd841
Removed old base class

git-svn-id: https://thermopower.svn.sourceforge.net/svnroot/thermopower/trunk@223 80daafeb-7430-0410-91d5-8b30b0bbd841