Version 0.50 - Arena (work in progress), Warlocks automation, bugfixes

The game has been updated! Version 0.50

• Added a minigame: Arena. The arena is still in development, as it turned out to be larger than I expected. Currently there will be one hero and 23 items available, later new items and a new hero will be added.

• [Warlocks] Added 3 new contracts.

• [Warlocks] Fixed a bug when opening contracts.

• [Grimoire] Added Spell: Summon a Hero (Class: Demon)

• Fixed bug with inability to load 'Load: Tokens' from cloud backup.