Added meme README

Author: shinin-light

README.md

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+# Manatee
+Manatee is an automatic .dcignore generator based on common .gitignore patterns found in https://github.com/github/gitignore
+
+It's [lazy and ugly](https://youtu.be/YXm1ICO8Nec), yet functional.
+
+# Usage
+1. Run the script
+```bash
+  ./generate.sh
+```
+2. Read the results
+```bash
+  cat ./output.gitignore
+```
+3. ???
+4. PROFIT
+