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)
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
mkimage-debootstrap: set ubuntuLatestLTS as Trusty

Ubuntu 14.04 LTS (Trusty Tahr) was released on Thu, 17 Apr 2014; Update
ubuntuLatestLTS accordingly.

Docker-DCO-1.1-Signed-off-by: Jonathan McCrohan <jmccrohan@gmail.com> (github: jmccrohan)
Merge pull request #5642 from jmccrohan/master

Update mkimage-debootstrap "ubuntuLatestLTS" to "trusty"
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
Revert "rename configFile to auth in the job"

This reverts commit e9c3e397436221528312c0d3b291ae5a12862ed2.

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
Revert "refactor build job to know only configFile"

This reverts commit b9731bccf2b2cc8c06ef8bdb41f72ca4791e63db.

Conflicts:
	server/server.go

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
Fix error name typo (ErrInvalidWorikingDirectory)

Docker-DCO-1.1-Signed-off-by: Lars R. Damerow <lars@grandstreet.us> (github: bitness)
Merge pull request #5665 from vieux/fix_auth_issue

Fix auth issue
Merge pull request #5667 from bitness/typo-fix

Fix error name typo (ErrInvalidWorikingDirectory)
Merge branch 'master' into bump_v0.11.1

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Bump to version v0.11.1
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Merge pull request #5668 from crosbymichael/bump_v0.11.1

Bump to version v0.11.1