Added Flow1DFV model

git-svn-id: https://thermopower.svn.sourceforge.net/svnroot/thermopower/trunk@186 80daafeb-7430-0410-91d5-8b30b0bbd841
Fixes to heat transfer computation in Flow1DFV/Flow1DFV2ph

git-svn-id: https://thermopower.svn.sourceforge.net/svnroot/thermopower/trunk@187 80daafeb-7430-0410-91d5-8b30b0bbd841
Added smoothSat function

git-svn-id: https://thermopower.svn.sourceforge.net/svnroot/thermopower/trunk@188 80daafeb-7430-0410-91d5-8b30b0bbd841
Changed interface of DistributedHeatTransferFV model (wnom for single tube)
Changed default heat transfer model to IdealHeatTransfer

git-svn-id: https://thermopower.svn.sourceforge.net/svnroot/thermopower/trunk@189 80daafeb-7430-0410-91d5-8b30b0bbd841
Worked on heat transfer models for gas

git-svn-id: https://thermopower.svn.sourceforge.net/svnroot/thermopower/trunk@190 80daafeb-7430-0410-91d5-8b30b0bbd841