TODO:
- libvirt_virDomainSetMemory should check memory is > 0
- check how to better handle renaming of domains (xm rename and cache)

- UUID lookup in hash.c

Other environment:
- support for UML
  
  + UML control layer should be easy at least for one user but incomplete

Probable TODOs:
- event on big domain state change (create, crashed, paused, shutdown, destroy)
- bindings for more languages

Would-be-nice TODO:
- man page for virsh and the libraries entry points
- more documentation and examples on using the toolkit
- examples for the error handling code

Cleanup:
- now that libxml2 is linked in, drop hash.[ch] and get back to libxml2 ones ?
  same for the buffers