add DSC article

Docker-DCO-1.1-Signed-off-by: Andrew Weiss <andrew.weiss@outlook.com> (github: anweiss)
update docs

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
Merge pull request #6803 from vieux/pr_6176

Implement tail for docker logs
Update usingdocker.md

boot2docker on windows also uses an IP of its own.

Docker-DCO-1.1-Signed-off-by: Tom Maaswinkel <tom.maaswinkel@12wiki.eu> (github: SvenDowideit)
expand to 'used b2d vm on any of the platforms'

Docker-DCO-1.1-Signed-off-by: SvenDowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
convert OSX into OS X

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@docker.com> (github: SvenDowideit)
removing the exclaimation mark from our hello-world examples, some users get trapped by the shell

Docker-DCO-1.1-Signed-off-by: SvenDowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
Lowercase world, because its not important.

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@docker.com> (github: SvenDowideit)
Merge pull request #6788 from SvenDowideit/remote-bang-from-hello-world

removing the exclaimation mark from our hello-world examples, some users...
Merge pull request #6781 from anweiss/6738-dscarticle

Add Article for PowerShell DSC
Merge pull request #6748 from LK4D4/increase_max_patricia_prefix

Increase max patricia prefix
Merge pull request #6789 from SvenDowideit/pr_out_expand_to_used_b2d_vm_on_any_of_the_platforms

expand to 'used b2d vm on any of the platforms'
Add backwards READ compatibility for the old libcontainer API

Docker-DCO-1.1-Signed-off-by: Tibor Vass <teabee89@gmail.com> (github: tiborvass)
fix compilation and panic

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
Add NOFILE and NPROC ulimit settings to the OpenRC init script

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)
Add NOFILE and NPROC ulimit settings to the SysV init script

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)
integcli: add & use pullImageIfNotExist for pulls

This speeds up the tag cli integration tests by about 20 seconds.

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
Merge pull request #6814 from tianon/more-init-ulimit

Add NOFILE and NPROC ulimit settings to OpenRC and SysVinit
Merge pull request #6763 from folieadrien/master

Migrate TestGetImagesHistory into unit and CLI test
Merge pull request #6780 from unclejack/tweak_cli_integration_tests

Tweak cli integration tests