Vendor containers/storage, update containers/image

Vendor containers/storage, and its dependencies github.com/pborman/uuid
and github.com/mistifyio/go-zfs, which we didn't already use.

Update the build Dockerfile to install their dependencies.

Add scriptlets that try to detect whether or not we need to use the
"libdm_no_deferred_remove" and/or "btrfs_noversion" build tags.

Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>

vendor/github.com/mistifyio/go-zfs/README.md

@@ -0,0 +1,54 @@
+# Go Wrapper for ZFS #
+
+Simple wrappers for ZFS command line tools.
+
+[![GoDoc](https://godoc.org/github.com/mistifyio/go-zfs?status.svg)](https://godoc.org/github.com/mistifyio/go-zfs)
+
+## Requirements ##
+
+You need a working ZFS setup.  To use on Ubuntu 14.04, setup ZFS:
+
+    sudo apt-get install python-software-properties
+    sudo apt-add-repository ppa:zfs-native/stable
+    sudo apt-get update
+    sudo apt-get install ubuntu-zfs libzfs-dev
+
+Developed using Go 1.3, but currently there isn't anything 1.3 specific. Don't use Ubuntu packages for Go, use http://golang.org/doc/install
+
+Generally you need root privileges to use anything zfs related.
+
+## Status ##
+
+This has been only been tested on Ubuntu 14.04
+
+In the future, we hope to work directly with libzfs.
+
+# Hacking #
+
+The tests have decent examples for most functions.
+
+```go
+//assuming a zpool named test
+//error handling ommitted
+
+
+f, err := zfs.CreateFilesystem("test/snapshot-test", nil)
+ok(t, err)
+
+s, err := f.Snapshot("test", nil)
+ok(t, err)
+
+// snapshot is named "test/snapshot-test@test"
+
+c, err := s.Clone("test/clone-test", nil)
+
+err := c.Destroy()
+err := s.Destroy()
+err := f.Destroy()
+
+```
+
+# Contributing #
+
+See the [contributing guidelines](./CONTRIBUTING.md)
+