PSA: If you are hosting your D project on github, don't forget to add the D topic!

[russhy]

Tip #2: If your project is recognised as a C project because of 
some C/C++ header files

- create a .gitattribute file
- add the following content:


```
*.h linguist-detectable=false
*.c linguist-detectable=false
*.hpp linguist-detectable=false
*.cpp linguist-detectable=false
```