Add README.md

README.md

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+Structure of this repo:
+
+Files and directories are organized in this pattern:
+
+```text
+<yymmdd>_<ShortTopicTitle>/{presentation/[*.md,*.pdf,*.pptx,...],
+                           codelabs/[example1, example2,..]}}
+                          
+```
+
+For example, this bash command creates directory structure for "Benchmarking" topic:
+
+```bash
+
+mkdir -p $(date +%y%m%d)_Benchmarking/{presentation,codelabs}
+
+```
+
+