Update readme

Author: fsimonis

README.md

@@ -4,32 +4,14 @@ This repository contains ready-to-run tutorial cases for the coupling library [p
 
 You may find step-by-step instructions for each case in the [preCICE wiki](https://github.com./precice/precice/wiki). *More tutorials come with each adapter* and you can also find them in the wiki.
 
-The files in this repository are organized in the form `problem_type/geometry/solvers`. The following cases are currently provided:
 
-* `CHT`: Conjugate Heat Transfer
-   * `heat_exchanger`: A shell-and-tube heat exchanger
-      * `buoyantSimpleFoam-CalculiX`
-   * `flow-over-plate`: A channel flow over a hot plate
-      * `buoyantPimpleFoam-fenics`: for running see `README.md`
-      * `buoyantPimpleFoam-nutils`: for running see `README.md`
-      * `buoyantSimpleFoam-Aster` : for running see the [preCICE wiki](https://github.com./precice/code_aster-adapter/wiki/Flow-over-plate-Code_Aster-Tutorial)
-* `HT`: Heat Transfer
-   * `partitioned-heat`: Solving heat equation on a partitioned domain
-      * `fenics-fenics`: for running see `README.md`
-* `FSI`: Fluid-Structure Interaction
-   * `flap_perp`: A flap attached on the walls of a channel, perpendicular to the flow
-      * `SU2-CalculiX`
-      * `OpenFOAM-CalculiX`
-      * `OpenFOAM-deal.II`: for running see the [preCICE wiki](https://github.com./precice/precice/wiki/Tutorial-for-FSI-with-deal.II-and-OpenFOAM)
-    * `flap_perp_2D`: 2D version of flap_perp
-      * `OpenFOAM-deal.II`: for running see the [preCICE wiki](https://github.com./precice/precice/wiki/Tutorial-for-FSI-with-deal.II-and-OpenFOAM)
-    * `cylinderFlap`: A cylinder with a flexible flap in a channel flow. The von Karman vortices cause the flap to oscillate. 
-      * `OpenFOAM-CalculiX`
-      * `OpenFOAM-deal.II`: for running see the [preCICE wiki](https://github.com./precice/precice/wiki/Tutorial-for-FSI-with-deal.II-and-OpenFOAM)
-    * `cylinderFlap_2D`: 2D version of flap_perp
-      * `OpenFOAM-deal.II`: for running see the [preCICE wiki](https://github.com./precice/precice/wiki/Tutorial-for-FSI-with-deal.II-and-OpenFOAM)
-    * `3D_Tube`: A 3D expanding tube with a pressure inlet boundary condition.
-      * `OpenFOAM-CalculiX`
-* `SSI`: Structure-Structure Interaction
-   * `loaded_beam`: A partitioned elastic beam fixed at both ends. A mechanical force is applied to one partition.
-      * `CalculiX-CalculiX`     
+Each folder in this directory represents a stand-alone tutorial containing:
+* instructions in the `docs` folder.
+* multiple participant folders with the format `<participant>_<solver>`. Pick a solver for each participant and start them to run the simulation.
+
+
+The website import relies on the following rules:
+* tutorials use dashes to separate words: `flow-over-plate`
+* a tutorial contains a `docs` folder.
+* `docs/instructions.md` contains a Jekyll front-matter and a `permalink: /tutorials-flow-over-plate.html`.
+* `docs/images/` is optional and all content will be available in `images/tutorials/flow-over-plate/`. (Use this prefix to include images in `instructions.md`)