auto_lock() returns now Allocation context
NOTE: Introduce breaking changes:
- auto_lock() method yields now Allocation object
- unlock() takes Allocation object as argument
151c111 Fix pid folder usage (#8)
1556a17 Introduce simple lockable cli tool (#7)
5242026 return Allocation context also for auto_lock() (#9)
0325c66 add possibility to load resources list data directly (#10)