README.md should include the submodule cloning

[dpcsar]

In the readme example. This project is cloned, but the submodules are not shown to be cloned. If a user is not a expert at git and don't know how to look for submodules, then they will not get the full functionality and may get stuck in image creation.

git clone https://github.com/cloudbase/windows-openstack-imaging-tools.git
pushd windows-openstack-imaging-tools
git submodule update --init
Import-Module .\WinImageBuilder.psm1