Fix url
Fix for 29a9bca5c: Commit introduced non POSIX (bash only) commands

The commit 29a9bca5c74d7305e81e0144b0252bf619a0bb6a does not work under
a POSIX shell like dash (Debian/Ubuntu). This code fixes the problem
and makes the script POSIX compliant.
Minor fix: Some plattform don't support the --vtxux for VBoxManage
Merge pull request #112 from dol/hotfix/posix-fix-for-debian

Fix for 29a9bca5c: Commit introduced non POSIX (bash only) commands and breaks on Debian (dash=/bin/sh)
Merge pull request #113 from dol/hotfix/optional-vtxux-support

Minor fix: Some hardware architecture don't support the --vtxux for VBoxManage modifyvm
Merge pull request #109 from sanrodari/patch-1

Fix Homebrew url
Add "set -e" to make_iso.sh

This way, if a command fails, the script stops instead of barrelling onwards.

Fixes #116
port patch to lxc-0.8.0 as thats the most stable version for docker
lxc 0.8.0 has bash bang lines
lxc-0.8.0 has bash-isms, so rather than patching the scripts and getting something unsupportable, I'm adding bash :/
If downloading docker is in the buildfile, then we cna over-ride it using a new Dockerfile
Merge pull request #115 from SvenDowideit/use-stable-lxc

Use stable lxc - 0.8.0 - its been found to be the most stable to run docker on
Merge pull request #117 from tianon/patch-2

Add "set -e" to make_iso.sh so we see errors sooner
add an example over-ride that uses the test.docker.io build
Merge pull request #119 from SvenDowideit/download-docker-during-build

If downloading docker is in the buildfile, then we can over-ride it using a new Dockerfile
add pipeworks to boot2docker
Merge pull request #120 from SvenDowideit/add-pipework

add pipeworks to boot2docker 
Closes #92
Helpful tips
pre-initialise the boot2docker.vmdk with some initialisation data, which the vm can detect to trigger an fdisk and mkfs in automount
Merge pull request #114 from SvenDowideit/auto-format-vmdk-on-init

pre-initialise the boot2docker.vmdk with some initialisation data, which the vm can detect to trigger an fdisk and mkfs in automount