Add readme.md

README.md

+training_material
+├── 01-Parallel_Programming
+│   ├── MPI
+	   link://workshop1
+	   link://workshop2
+	   link://workshop3
+│   ├── OpenMP
+	   link://workshop1
+	   link://workshop2
+	   link://workshop3
+│   └── Python
+           link://ex10
+├── 02-GPU_Programming
+│   ├── CUDA
+│   ├── GPU_Python
+│   └── OpenACC
+├── 03-PGAS_Languages
+│   ├── Chapel
+│   └── Coarray_Fortran
+├── 04-Data_Processing
+│   ├── Python
+│   └── R
+├── 05-Debugging
+│   ├── C
+│   ├── Fortran
+│   └── Python
+├── 06-Profiling
+│   ├── C
+│   ├── Fortran
+│   └── Python
+├── 07-Best_Practice_Guides
+│   ├── C
+│   ├── Fortran
+│   └── Python
+└── 99-var
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