Change the readme to markdown format

README.md

@@ -1,29 +1,31 @@
-
-           ovni - Obtuse but Versatile Nanoscale Instrumentation
+![Ovni logo](doc/fig/logo2.png)
 
 The ovni project is composed of a runtime library (libovni.so), which generates
-a fast binary trace, and post-processing tools such as the emulator (ovniemu),
+a fast binary trace, and post-processing tools such as the emulator ovniemu,
 which transform the binary trace to the PRV format, suitable to be loaded in
 Paraver.
 
 The libovni.so library is licensed under MIT, while the rest of tools are GPLv3
 unless otherwise stated.
 
-For more information, take a look at the doc/ directory. You can display the
-documentation in HTML by running `mkdocs serve` from the root directory.
+For more information, read the [documentation online][doc] or take a look at the
+doc/ directory. You can display the documentation in HTML by running `mkdocs
+serve` from the root directory.
+
+[doc]: https://ovni.readthedocs.io
 
 To build ovni you would need a C compiler, MPI and cmake version 3.20 or newer.
-To compile in build/ and install into $prefix use:
+To compile in build/ and install into `$prefix` use:
 
-  % mkdir build
-  % cd build
-  % cmake -DCMAKE_INSTALL_PREFIX=$prefix ..
-  % make
-  % make install
+	$ mkdir build
+	$ cd build
+	$ cmake -DCMAKE_INSTALL_PREFIX=$prefix ..
+	$ make
+	$ make install
 
 To run the tests you can run (from the build directory):
 
-  % make test
+	$ make test
 
 See cmake(1) and cmake-env-variables(7) to see more information about
 the variables affecting the generation and build process.