Fix tmp dir never cleanup
add an example of what to expect from docker diff, and what the 3 codes mean
add example for docker history
add example
Tiny typo cleanup
Update to go1.2rc5
don't forward SIGCHLD to container

It makes no sense to forward SIGCHLD to the container.
More informative error message on name collisions

This is the proposed fix for #2506. It provides a more complete message
with regards to name collisions including informing of the opposing
containers ID.

I have included a test to ensure that the correct short id is displayed
to make the message easier to understand.
Merge pull request #2638 from FreakyDazio/2506-name-conflict-error

More informative error message on name collisions
Merge pull request #2749 from jpoimboe/dont-forward-SIGCHLD

Do not forward SIGCHLD to container
gofmt_test
Merge pull request #2724 from SvenDowideit/docker-diff-example

add an example of what to expect from docker diff, and what the 3 codes mean
Merge pull request #2752 from dotcloud/gofmt_test

Go fmt tests
Merge pull request #2742 from rick/patch-1

Tiny typo cleanup
Merge pull request #2726 from SvenDowideit/docker-history-doc

add example for docker history
Merge pull request #2729 from SvenDowideit/docker-info-doc

add example for docker info
Merge pull request #2743 from tianon/go1.2rc5

Update to go1.2rc5
Merge pull request #2718 from dotcloud/fix_tmp_dir_never_cleanup

Fix tmp dir never cleanup