[backend] implement a 'status' command, dumps xml info on every run, for every domain/vm

also: more comments about wtf happens in the script.
still not enough.
Merge branches 'backend-status-command' and 'master' of github.com:weimarnetz/virsh-wrapper

* 'backend-status-command' of github.com:weimarnetz/virsh-wrapper:

# Via Andi (1) and Max F. Albrecht (1)
* 'master' of github.com:weimarnetz/virsh-wrapper:
  [restructure] move backend code to /backend, rename /cli
  dump ideas into README #2
  dump ideas into README
  [cli] naming things
  (fix readme)
  (fix readme)
  (fix readme)
  (fix readme)
  refactor to modules, add README w/ License
  initial commit
Merge pull request #2 from weimarnetz/backend-status-command

'status' command