Add README.md

README.md

+# Parallel programming with OpenMP
+
+This repository contains various exercises and examples on parallel programming with OpenMP.
+
+A C or Fortran compiler supporting OpenMP is needed for building the code. Simple cases can
+be built and run as:
+
+ - gcc -o exe -fopenmp exercise.c 
+ - gfortran -o exe -fopenmp exercise.c
+ 
+where gcc/gfortran and -fopenmp should be replaced by proper compiler commands and options if you are not using the GNU compilers. 
+For more complex cases a Makefile is provided.
+
+## Exercises
+
+## Examples
\ No newline at end of file