I know, obvious question, but some times people do things differently.
Is the code checked into GitHub the latest? There's not some private repo where you push your changes and then do a big push at once to GitHub for each release (I've seen this!)??
I'm a developer (tho I work mostly in C++ on backend/server software) and I wouldn't mind pushing your latest changes to my test board or getting my hands dirty with some PHP (which I've worked with plenty). I see the repo looks fairly active with checkins just about every day, so I suspect I know the answer to my question, but I figured it was worth asking anyway. 🙂