Increase max image depth to 127
Simplify and resync hack/make/test and hack/make/dyntest output handling
Clean output and simplify hack/make/*test by adding go_test_dir function in make.sh
Add much better pruning of non-tested directories, including pruning the integration tests directory (doing more with "find" and nothing with "grep")
Unify hack/make/*test further by invoking hack/make/test directly from dyntest
Unify dyntest/test and dynbinary/binary hack bundlescripts further by cross-invocation and keeping all the logic in one place, taking advantage of LDFLAGS_STATIC that is the only bit that gets replaced for dyntest/dynbinary
Add separate "test-integration" bundlescript (and corresponding dyntest-integration bundlescript)
Update mkimage-debootstrap with even more tweaks for keeping images tiny by more aggressively removing cache files and by not downloading apt-cache Translations files
Engine: integer job status, improved stream API

* Jobs return an integer status instead of a string
* Status convention mimics unix process execution: 0=success, 1=generic error, 127="no such command"
* Stdout and Stderr support multiple thread-safe data receivers and ring buffer filtering
Engine: new command 'stop' gracefully stops a container.
move t from arg to env
Make Tianon the hack maintainer
dockerinit: set hostname

Set the hostname in dockerinit instead of with lxc utils.  libvirt-lxc
doesn't have a way to do this, so do it in a common place.
dockerinit: set IP address

Set the IP address in dockerinit instead of lxc utils, to prepare for
using libvirt-lxc.
dockerinit: propagate "container" env variable from lxc

Lxc (and libvirt) already set the "container" env variable
appropriately[1], so just use that.

[1] http://www.freedesktop.org/wiki/Software/systemd/ContainerInterface/
Add -bip flag: allow specification of dynamic bridge IP via CIDR

e.g.:

```
docker -d -bip "10.10.0.1/16"
```

If set and valid, use provided in place of trial and error from pre-defined array in network.go.
Mutually exclusive of -b option.
Merge pull request #3151 from tianon/more-debootstrap-tweaks

Update mkimage-debootstrap with even more tweaks for keeping images tiny...
Merge pull request #3202 from jpoimboe/libvirt-prereq-env

dockerinit: propagate "container" env variable from lxc
Merge branch 'libvirt-prereq-network' of https://github.com/jpoimboe/docker
Merge pull request #3201 from jpoimboe/libvirt-prereq-network

Set hostname and IP address from dockerinit