Fix outdated docs explaining how to setup a dev environment. Building docker with docker ftw
Packaging, issue #960: Document PUBLISH_PPA for staging/production release
Merge pull request #1183 from dotcloud/960-packaging-PPA

Packaging, issue #960: Document PUBLISH_PPA for staging/production release
Merge pull request #1178 from dotcloud/fix-dev-environment

Fix outdated docs explaining how to setup a dev environment
Make the TestAllocate{UDP,TCP}PortLocalhost more reliable

- For the TCP test try again if socat wasn't listening yet;
- For the UDP test raise the timeout to a minute to workaround what
  seems to be an issue with Linux.