Add known issues to sections via new "issues" extension.
Add known issues. Fix build warnings.
lock around read operations in graph

Writes and reads will fail with ErrBusy if there's
concurrent reads or writes, respectively. It is
not sufficient to only lock around writes.
gograph: Use RWMutex to allow concurrent readers
gograph: allow Walk() reentrance

Hold the read lock while reading the child graph,
then walk over the children without any lock, in
order to avoid deadlock.
testing infrastructure, issue #1800: Refactor docker testing using Docker in Docker
docker-ci 0.35. Push docker coverage and testing into docker-ci production. Update docker nightlyrelease
docker-ci 0.36. Patch hack/dind with latest code for nightly release to work.
docker-ci 0.37. Patch hack/dind with latest code for docker-test.
docker-ci 0.40. Migrate docker-ci to Digital Ocean.
docker-ci 0.4.5: Sync tests with progress in docker and docker-registry. Use revamped shiny DinD.
Fix 2585 and clean up warning in contributing.rst
fix mergeConfig with new ports
Deprecate old tagging format
prevent panic if you use API in a wrong way
Merge pull request #2584 from dotcloud/docker-ci

docker-ci production sync
Merge pull request #2599 from dotcloud/prevent_panic_wrong_api_use

Prevent panic if you use API in a wrong way
Merge pull request #2597 from dotcloud/deprecate_separate_tag

Deprecate old tagging format
Merge pull request #2593 from dotcloud/2578

Fix mergeConfig with new ports
Merge pull request #2565 from danielnorberg/master

lock around read operations in graph