packaging; issue #30: Original files to make the Ubuntu PPA on launch date
Added a lot of basic instructions on various topics
Redundant message in basics.
Make writeBroadcaster safe for concurrent use.
Swapped a map for a list in writeBroadcaster.
Check if the containers are really running when starting docker
Working in progress: add unit tests for the running state check
Close HTTP response bodies

Fixes #285.
Expand the contributing guidelines
Adding git commit to the version output

The Makefile must be used in order to inject the git commit
via -ldflags.
Shortening the git commit used in the version command
make complex options to stand out
add host name parameter to "run" command

fixes #243
Add test to reproduce issue #306
Images can be removed by short-hand ID. Solves #306.
add support for xz compression

This adds xz as a compression option.
xz is alread supported by bsdtar without the external xz program.
use xz compression when pushing images to the registry

This makes the xz compression the default.
Merge pull request #305 from fsouza/master

Makefile: simplify "fmt" target
Merge pull request #286 from titanous/285-close-bodies

Close HTTP response bodies
Merge remote-tracking branch 'dotcloud/master' into dhrp/docs