In the git page there should be a link that ends with .git that's the link you use to clone the repo in your git client
No Exp = Is not patched to fix the AP / Exp Patched = Already prepatched against the AP and yes it's out of beta latest patch out is release v1
If no one else is working on it sure, remember though each version has different dex entries... by my mistake there is only the Black entries in the git. but a different one for the white entries will be uploaded later.
Actually go to 0001/0016.txt and compare with 0000/0016.txt if you want a challenge to find which ones are wrong... and left to translate (actually this goes to anyone with tons of patience and time)