use tabwriter to display usage in mflag

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
improve some usages

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
update the docs to reflect the nice \n handling

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)
Set container pid for process in native driver
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Merge pull request #5643 from crosbymichael/fix-native-pid

Set container pid for process in native driver
Merge branch 'master' into bump_v0.11.0

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Merge pull request #4 from SvenDowideit/improve_mflag_usage_docs

update the docs for the new \n rendering
Merge pull request #5634 from vieux/improve_mflag_usage

Add support for \n in usages
Merge pull request #5642 from jmccrohan/master

Update mkimage-debootstrap "ubuntuLatestLTS" to "trusty"
Bump version to v0.11.0
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Merge pull request #5640 from crosbymichael/bump_v0.11.0

Bump version to v0.11.0
Merge branch 'release' into merge_release_v0.11.0

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Change version to v0.11.0-dev
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Merge pull request #5660 from crosbymichael/merge_release_v0.11.0

Merge release to master v0.11.0
client: Add --no-check to docker version

Allow check for latest docker version to be disabled; closes #4802.

Docker-DCO-1.1-Signed-off-by: Jonathan McCrohan <jmccrohan@gmail.com> (github: jmccrohan)