FAQ - Pistos/diaspora GitHub Wiki
Short answer: As they say in Facebookland: "It's Complicated"
Long answer: Read this post on your Diaspora pod of choice:
While I have been granted the privilege of being able to commit and merge directly into Diaspora Inc.'s codebase, out of respect for others, I do not exercise this privilege for non-trivial changes to codebases that I did not found. I believe in the effectiveness of peer review: I think the reviewer(s) and merger(s) should be someone(s) different than the author(s) of code. So, features and fixes that I code will only get merged into that fork when and if someone else merges it in.
That's up to Diaspora Inc.
Ask your podmin (pod administrator) to merge it into his/her server code, or to use one of my release branches. Refer them to the Technical Documentation if they want more detail on how to do that.