This is exactly what we do at our team too -- we're developer centric and as developers, we love using Github and Github issues (+ pull-requests) for everything (including PM and HR)
One thing we do miss are certain features from Trello-like tools that give a nice overview of your issues and facilitate PM, so we built a Chrome/FF extension to fill in those gaps (http://zenhub.io)
One thing we do miss are certain features from Trello-like tools that give a nice overview of your issues and facilitate PM, so we built a Chrome/FF extension to fill in those gaps (http://zenhub.io)
Disclaimer: I work at Axiom Zen