Add Github topics to the repository

Hi, can you add the following topic to this repository?

• https://github.com/topics/sdr

Thanks!

Seems like a good addition, you can have quite a collection of topics so perhaps using more than just five could help with find ability. Although in practice I rarely see a difference in exposure between any of my repositories with and without topics.

Hi @vsonnier , can you do this? It takes only a few seconds and helps other people to find this repository.

Added; thanks

Thank you!