small update to API docs to go with #4276

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
Fix cli argument usage typo for docker --mtu

Docker-DCO-1.1-Signed-off-by: Danny Berger <dpb587@gmail.com> (github: dpb587)
Add simple "grep" to hide the harmless "warning: no packages being tested depend on ..." in "go test -coverpkg ..." output

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)
Merge pull request #4283 from tianon/hide-no-packages-being-tested

Add simple "grep" to hide the harmless "warning: no packages being tested depend on ..." in "go test -coverpkg ..." output
Drop -mtu from docs in favor of --mtu only

Docker-DCO-1.1-Signed-off-by: Danny Berger <dpb587@gmail.com> (github: dpb587)
Merge pull request #4277 from SvenDowideit/tianon-made-me-doit

small update to API docs to go with #4276
Merge pull request #4280 from dpb587/bugfix-mtu-typo

Fix argument usage typo for docker --mtu
Merge pull request #4284 from crosbymichael/refactor-tty

Move tty into drivers
Initial commit of libcontainer
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Make separate nsinit pkg for a dockerinit like init
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
WIP moving to nsini
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Use nsinit for setting up namespace
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Improve general quality of libcontainer

Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume.charmes@docker.com> (github: creack)
Fix ptmx issue on libcontainer

Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume.charmes@docker.com> (github: creack)
Use nsinit as app
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Simplify namespaces with only nsinit
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Implement init veth creation
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Add dynamic veth name
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
General cleanup of libcontainer
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
OSX compilation

Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume.charmes@dotcloud.com> (github: creack)