adding-a-cooling-routine-to-swift.md

 so now I've built SWIFT and tested it with some of the examples scripts.
 
-Can we new include hydroparticles?
+Can we new include hydroparticles? yes - Tom's already got an example.
+
+cp -r /gpfs/data/tt/Codes/Swift-git/swiftsim.July21/examples/IsothermalPotential//HydroStatic/ .
+
+and try it :)  compare to rgb's attempt
+
+/gpfs/data/rgb/Swift/swiftsim/examples/IsothermalPotential/HydroStatic
+
+