Bump to version v0.7.5

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Merge pull request #3532 from crosbymichael/bump_v0.7.5

Bump to v0.7.5
Merge branch 'release' into merge_release_v0.7.5

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Change version to v0.7.5

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Merge pull request #3537 from crosbymichael/merge_release_v0.7.5

Merge release v0.7.5
Use gzip compression in Ubuntu packages to make it at least possible to install on Lucid.

Docker-DCO-1.1-Signed-off-by: Evan Krall <krall@yelp.com> (github: EvanKrall)
Merge pull request #3543 from EvanKrall/gzip_debs

Use gzip compression in Ubuntu packages to make it possible to install on Lucid
move container_delete to job

handle error

remove useless errStr

Docker-DCO-1.1-Signed-off-by: Victor Vieux <victor@docker.com> (github: vieux)
Move restart to a job

Docker-DCO-1.1-Signed-off-by: Victor Vieux <victor.vieux@docker.com> (github: vieux)
Merge pull request #3476 from vieux/restart_job

Move restart to a job
Merge pull request #3180 from vieux/job_container_delete

Move container_delete to job
Move image_export to a job

Docker-DCO-1.0-Signed-off-by: Victor Vieux <victor.vieux@docker.com> (github: vieux)
Merge pull request #3490 from vieux/image_export_job

Move image_export to a job
Merge branch 'master' of https://github.com/odonnellryan/3157-docker