Try a different presentation of infrastructure documentation.
Update CHANGELOG.md
Add Stackbrew.
Merge pull request #2253 from jpetazzo/infrastructure-docs

Try a different presentation of infrastructure documentation.
Use heredoc to make expect script more clear
Merge pull request #2283 from tmc/master

Make mkimage-arch.sh a little more clear
Merge remote-tracking branch 'tianon/hack-release' into hack-release
add vender/pkg/ to .gitignore