fix event removal

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
fix(daemon): ensure the /var/lib/docker dir exists

The btrfs driver attempts to stat the /var/lib/docker directory to
ensure it exists. If it doesn't exist then it bails with an unhelpful
log line:

```
2014/05/10 00:51:30 no such file or directory
```

In 0.10 the directory was created but quickly digging through the logs I
can't tell what sort of re-ordering of code caused this regression.

Docker-DCO-1.1-Signed-off-by: Brandon Philips <brandon.philips@coreos.com> (github: philips)
Use int64 instead of int

Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume@charmes.net> (github: creack)
Cleaned up Network settings overview
runmetrics update, linking to collectd plugin rather than just hinting
Always mount a /run tmpfs in the container

All modern distros set up /run to be a tmpfs, see for instance:
https://wiki.debian.org/ReleaseGoals/RunDirectory

Its a very useful place to store pid-files, sockets and other things
that only live at runtime and that should not be stored in the image.

This is also useful when running systemd inside a container, as it
will try to mount /run if not already mounted, which will fail for
non-privileged container.

Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson)
add vieux as server's MAINTAINERS

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
Merge pull request #5750 from vieux/vieux_server_maintainer

add vieux as server's MAINTAINERS
Merge pull request #5717 from philips/mkdir-in-daemon

fix(daemon): ensure the /var/lib/docker dir exists
move version out of server

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
Merge pull request #5751 from vieux/move_version

move version out of server
Merge pull request #5747 from ojilles/patch-2

runmetrics update, linking to collectd plugin rather than just hinting
Was checking something for a PR and noticed some quote issues

Docker-DCO-1.1-Signed-off-by: SvenDowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
move RegisterLinks to daemon

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
Merge pull request #5759 from vieux/move_register_links_to_daemon

move RegisterLinks to daemon
Merge pull request #5707 from vieux/fix_event_removal

fix event removal
Merge pull request #5757 from SvenDowideit/pr_out_was_checking_something_for_a_pr_and_noticed_some_quote_issues

Was checking something for a PR and noticed some quote issues
Merge pull request #5753 from creack/fix-beam-32bit

[beam] Use direct iota instead of binary shift
Merge pull request #5655 from alexlarsson/mount-run-dir

Always mount a /run tmpfs in the container
Merge pull request #5745 from ojilles/patch-1

Cleaned up Network settings overview