VMA extractor

vma.py implements a VMA extraction tool in Python 3.

Usage:

./vma.py path/to/source.vma path/to/target/directory

I think it is pretty important to be able to read Proxmox backups outside of a Proxmox environment. Yet, porting their VMA implementation to a standalone tool proved difficult. VMA-Reader and VMA-Writer are implemented as patches to the Proxmox-patched version and Qemu and are thus very difficult to compile on non-Proxmox systems.