Replaced README with a markdown version for nicer formatting on the website

Author: UnnamedMoose

README README.mdREADME renamed to README.md

@@ -1,11 +1,13 @@
-Welcome to this set of OpenFOAM® programming tutorials!
+## Welcome to this set of OpenFOAM® programming tutorials!
 
 These are intented to provide a beginner C++ programmer with hands-on examples of
 how to develop code within the OpenFOAM® framework. These tutorials hope to be more
 approachable than most of the materials available on-line, which tend to assume
 that the user is proficient in the C++ programming language. Please see below for
 a brief summary of what each individual tutorial covers and how to use it.
 
+## Requirement
+
 It's advisable that you go through these basic C++ tutorials, having tried compiling
 and running most of the examples, before continuing:
 http://www.cplusplus.com/doc/tutorial/
@@ -18,15 +20,16 @@ https://cfd.direct/openfoam/user-guide/tutorials/
 Enjoy and please provide me with feedback to make these tutorials more useful!
 Contributions from the community are also more than welcome!
 
-
 Copyright by Artur K. Lidtke, 2017.
 
-Disclaimer: this offering is not approved or endorsed by OpenCFD Limited, producer
+# Disclaimer
+
+This offering is not approved or endorsed by OpenCFD Limited, producer
 and distributor of the OpenFOAM® software via www.openfoam.com, and owner of the
 OPENFOAM® and OpenCFD® trade marks.
 
----------
-Tutorial 0 - Hello world
+#---------
+# Tutorial 0 - Hello world
 
     Presents a basic OpenFOAM executable which prints a simple, yet important,
     message.
@@ -36,36 +39,46 @@ Tutorial 0 - Hello world
         cd testCase
         ./Allrun
 
-Tutorial 1 - Input and output
+#---------
+# Tutorial 1 - Input and output
 
     Shows how to read information from dictionaries and output it into files.
 
     To run:
+    ```
         wmake
         cd testCase
         ./Allrun
+    ```
 
-Tutorial 2 - Understanding the mesh
+#---------
+# Tutorial 2 - Understanding the mesh
 
     Discusses how the OpenFOAM mesh description works and introduces the code
     interface used to interact with the grid.
 
     To run:
+    ```
         wmake
         cd testCase
         ./Allrun
+    ```
 
-Tutorial 3 - Basic field operations
+#---------
+# Tutorial 3 - Basic field operations
 
     Introduces the idea of a field object, reading values from OF-native files
     using built-in operators, as well as calculating field values by hand.
 
     To run:
+    ```
         wmake
         cd testCase
         ./Allrun
+    ```
 
-Tutorial 4 - Basic parallel computing
+#---------
+# Tutorial 4 - Basic parallel computing
 
     Gives a crash-course introduction to parallel computing with OpenFOAM and
     OpenMPI based on the example "solver" developed in Tutorial 2. The way
@@ -74,11 +87,14 @@ Tutorial 4 - Basic parallel computing
     is upgraded to work in parallel.
 
     To run:
+    ```
         wmake
         cd testCase
         ./Allrun
+    ```
 
-Tutorial 5 - Custom classes
+#---------
+# Tutorial 5 - Custom classes
 
     Shows how a new class may be added to expand OpenFOAM functionality, as well
     as gives an example implementation of a class derived from and OpenFOAM
@@ -87,23 +103,29 @@ Tutorial 5 - Custom classes
     all of the baseline functionality.
 
     To run:
+    ```
         wmake
         cd testCase
         ./Allrun
+    ```
 
-Tutorial 6 - Custom libraries
+#---------
+# Tutorial 6 - Custom libraries
 
     Shows how an external library may be compiled and added to OpenFOAM. This is
     done by moving the key functionality of the "solver" from Tutorials 2 and 3
     into an independent library, and then linking that against the rest of the
     solver code.
 
     To run:
+    ```
         ./Allwmake
         cd testCase
         ./Allrun
+    ```
 
-Tutorial 7 - Custom boundary condition
+#---------
+# Tutorial 7 - Custom boundary condition
 
     Shows how a custom boundary condition may be implemented.
     It does not introduce a bespoke utility, but instead only implements a
@@ -125,11 +147,14 @@ Tutorial 7 - Custom boundary condition
     layer profile at the inlet and how it affects the solution.
 
     To run:
+    ```
         ./Allwmake
         cd testCase
         ./Allrun
+    ```
 
-Tutorial 8 - Runtime post processing utility
+#---------
+# Tutorial 8 - Runtime post processing utility
 
     Discusses the implementation of a a runtime post-processing utility which
     computes the flow rate through a face zone defined in the mesh using the
@@ -154,11 +179,14 @@ Tutorial 8 - Runtime post processing utility
     by the utility in the postProcessing directory.
 
     To run:
+    ```
         wmake libso
         cd testCase
         ./Allrun
+    ```
 
-Tutorial 9 - Transport equation
+#---------
+# Tutorial 9 - Transport equation
 
     Introduces the concepts behind solving a simple scalar transport equation.
 
@@ -180,9 +208,11 @@ Tutorial 9 - Transport equation
     transport equation saved as the "result" field.
 
     To run:
+    ```
         wmake
         cd testCase
         ./Allrun
+    ```
 
     Recommended reading:
         - Wikipedia is always a good start: