we have migrated our core source code to Github. You can find the new repository here:
This means that the Launchpad branches are now read-only, and will be kept only for historical purposes.
External contributions can be made through forking the Github repo and creating pull requests.
The stable release branches have been moved into the dhis2-core repo as separate branches.
The jenkins environment has been updated to pull from Github.
While we are still figuring out the exact development workflow, for those interested we have started to write up the process.