Version 0.60 - secondary contracts for undea, dead man's piggy bank, sleep mode

Version 0.60b It's not a huge update, but I hope it allows me to slowly get back to work.

List of changes

Added secondary contracts and the regular contract that opens them.

Added a dead man's piggy bank, a analogue of the infernal piggy bank, which allows you to get more prestige of the undead when you restart.

• Added setting: additional offline recalculation. It will help to recalculate offline if computer goes to sleep mode. And maybe fix other problems with energy regeneration. This setting will be ON by default.