Use buildah commit and bud in podman

Vendor in buildah and use as much of commit and bug as possible for podman
build and commit.

Resolves #586
Signed-off-by: baude <bbaude@redhat.com>

Closes: #681
Approved by: mheon

vendor/github.com/openshift/imagebuilder/README.md

@@ -0,0 +1,104 @@
+Docker / OCI Image Builder
+==========================
+
+[![Go Report Card](https://goreportcard.com/badge/github.com/openshift/imagebuilder)](https://goreportcard.com/report/github.com/openshift/imagebuilder)
+[![GoDoc](https://godoc.org/github.com/openshift/imagebuilder?status.png)](https://godoc.org/github.com/openshift/imagebuilder)
+[![Travis](https://travis-ci.org/openshift/imagebuilder.svg?branch=master)](https://travis-ci.org/openshift/imagebuilder)
+[![Join the chat at freenode:openshift-dev](https://img.shields.io/badge/irc-freenode%3A%20%23openshift--dev-blue.svg)](http://webchat.freenode.net/?channels=%23openshift-dev)
+
+Note: this library is beta and may contain bugs that prevent images from being identical to Docker build.  Test your images (and add to our conformance suite)!
+
+This library supports using the Dockerfile syntax to build Docker
+compatible images, without invoking Docker build. It is intended to give
+clients more control over how a Docker build is run, including:
+
+* Instead of building one layer per line, run all instructions in the
+  same container
+* Set Docker HostConfig settings like network and memory controls that
+  are not available when running Docker builds
+* Mount external files into the build that are not persisted as part of
+  the final image (i.e. "secrets")
+* If there are no RUN commands in the Dockerfile, the container is created
+  and committed, but never started.
+
+The final image should be 99.9% compatible with regular docker builds,
+but bugs are always possible.
+
+Future goals include:
+
+* Output OCI compatible images
+* Support other container execution engines, like runc or rkt
+* Better conformance testing
+* Windows support
+
+## Install and Run
+
+To download and install the library and the binary, set up a Golang build environment and with `GOPATH` set run:
+
+```
+$ go get -u github.com/openshift/imagebuilder/cmd/imagebuilder
+```
+
+The included command line takes one argument, a path to a directory containing a Dockerfile. The `-t` option
+can be used to specify an image to tag as:
+
+```
+$ imagebuilder [-t TAG] DIRECTORY
+```
+
+To mount a file into the image for build that will not be present in the final output image, run:
+
+```
+$ imagebuilder --mount ~/secrets/private.key:/etc/keys/private.key path/to/my/code testimage
+```
+
+Any processes in the Dockerfile will have access to `/etc/keys/private.key`, but that file will not be part of the committed image.
+
+Running `--mount` requires Docker 1.10 or newer, as it uses a Docker volume to hold the mounted files and the volume API was not
+available in earlier versions.
+
+You can also customize which Dockerfile is run, or run multiple Dockerfiles in sequence (the FROM is ignored on
+later files):
+
+```
+$ imagebuilder -f Dockerfile:Dockerfile.extra .
+```
+
+will build the current directory and combine the first Dockerfile with the second. The FROM in the second image
+is ignored.
+
+
+## Code Example
+
+```
+f, err := os.Open("path/to/Dockerfile")
+if err != nil {
+	return err
+}
+defer f.Close()
+
+e := builder.NewClientExecutor(o.Client)
+e.Out, e.ErrOut = os.Stdout, os.Stderr
+e.AllowPull = true
+e.Directory = "context/directory"
+e.Tag = "name/of-image:and-tag"
+e.AuthFn = nil // ... pass a function to retrieve authorization info
+e.LogFn = func(format string, args ...interface{}) {
+	fmt.Fprintf(e.ErrOut, "--> %s\n", fmt.Sprintf(format, args...))
+}
+
+buildErr := e.Build(f, map[string]string{"arg1":"value1"})
+if err := e.Cleanup(); err != nil {
+	fmt.Fprintf(e.ErrOut, "error: Unable to clean up build: %v\n", err)
+}
+
+return buildErr
+```
+
+Example of usage from OpenShift's experimental `dockerbuild` [command with mount secrets](https://github.com/openshift/origin/blob/26c9e032ff42f613fe10649cd7c5fa1b4c33501b/pkg/cmd/cli/cmd/dockerbuild/dockerbuild.go)
+
+## Run conformance tests (very slow):
+
+```
+go test ./dockerclient/conformance_test.go -tags conformance
+```