Link to tutorial files (featured tutorials) (solids4foam#148)

tutorials/fluidSolidInteraction/3dTube/README.md

@@ -4,6 +4,8 @@ sort: 4
 
 # My fourth tutorial: `3dTube`
 
+You can find the files for this tutorial under [`tutorials/fluidSolidInteraction/3dTube`](https://github.com/solids4foam/solids4foam/tree/master/tutorials/fluidSolidInteraction/3dTube).
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 ## Tutorial Aims

tutorials/fluidSolidInteraction/beamInCrossFlow/README.md

@@ -4,6 +4,8 @@ sort: 3
 
 # My third tutorial: `beamInCrossFlow`
 
+You can find the files for this tutorial under [`tutorials/fluidSolidInteraction/beamInCrossFlow`](https://github.com/solids4foam/solids4foam/tree/master/tutorials/fluidSolidInteraction/beamInCrossFlow).
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 ## Tutorial Aims

tutorials/fluids/cylinderInChannel/README.md

@@ -4,6 +4,8 @@ sort: 2
 
 # My second tutorial: `cylinderInChannel`
 
+You can find the files for this tutorial under [`tutorials/fluids/cylinderInChannel`](https://github.com/solids4foam/solids4foam/tree/master/tutorials/fluids/cylinderInChannel).
+
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 ## Tutorial Aims

tutorials/solids/thermoelasticity/hotSphere/README.md

@@ -4,6 +4,8 @@ sort: 1
 
 # My first tutorial: `hotSphere`
 
+You can find the files for this tutorial under [`tutorials/solids/thermoelasticity/hotSphere`](https://github.com/solids4foam/solids4foam/tree/master/tutorials/solids/thermoelasticity/hotSphere).
+
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 ## Tutorial Aims