Rename Container -> Config.

Docker-DCO-1.1-Signed-off-by: Victor Marmol <vmarmol@google.com> (github: vmarmol)
Merge pull request #39 from vmarmol/rename-container

Rename Container -> Config.
Remove generic context and replace with fields
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@docker.com> (github: crosbymichael)
Update sample config with context changes
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@docker.com> (github: crosbymichael)
Add tests and sample files for selinux and apparmor
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@docker.com> (github: crosbymichael)
Merge pull request #51 from crosbymichael/type-context

Strongly type context on the Config
Improve nsinit usage instructions

nsinit must be run as root.

Tidy up the README somewhat to clarify the distinction between
libcontainer and the nsinit CLI.

Fix some typos in other files.

Docker-DCO-1.1-Signed-off-by: Glyn Normington <gnormington@gopivotal.com> (github: glyn)