Fix: hydraulic and osmotic pressure composition in Osmotic.Membrane
New: example Thermal.Examples.SkinHeatFlow to simulate heat losses from skin,
New: example Osmotic.Examples.CerebrospinalFluid as possibility to simulate cerebral edema
added release notes for version 2.1
display units for small CSF flow simulation "ml/day" or "ml/(mmHg.day)"
Merge branch 'master' of https://github.com/MarekMatejak/Physiolibrary