modified:   picostack/vms/models.py
- Corrected custom saving for VmInstance.disk_filename
modified:   picostack/process_spawn.py
- reimplemented the pifile locking. Now the lock class is instanced inside the
  forked process. See fork_parent.
modified:   picostack/settings.py
modified:   picostack/templates/instances.html
- Added page refresh every 4 sec using javascript.
modified:   picostack/templates/layout.html
- Added new block - a placeholder for javascript at the bottom.
modified:   picostack/vm_manager.py
- Added kill_all_machines() into interface of vm manager.
-
modified:   picostk
- Implemented a new command called 'clean all' for state cleaning (incl. logs
  and pids).
modified:   setup.py
- Added dependency n psutil.