The head of master will generally have New Relic's latest release. However, New Relic wants to reserve to reserve the ability to push an edge to the master. If you download a release from github, use the appropriate tag. New Relic usually pushes beta versions of a release to a working branch before tagging them for General Availability.
Fork away and feel free to send us pull requests (branches only please) for any ideas or bugfixes you come up with to New Relic Support (for fastest service) or email support @ New Relic. Also, you may be able to find support from the community at Stack Overflow. Tag your post with