Update: additional Knowledge category, Stronghold level 4, the Tower of Odin, and more

Added:
• Special Knowledge category
A new branch of Knowledge is available in the Shamans' Residence, allowing you to speed up Aesir recovery, increase troop defense in an Onslaught, increase the number of scouts in a troop, and upgrade other economic and military stats.
Added upon players' requests:
• New Stronghold level
Now you can upgrade the Clan Fortress to level 4. To do this, you will need a special item – Precious Dust. To get it, you need to transform Legendary gems in the Workshop.
• Tower of Odin and siege of the Clan Fortress
After building the Tower of Odin, the Clan Chief and Elders can activate Siege status in the Stronghold. In this case, it will be attacked by the enemies – troops led by jötunns (neutral troops), or other Jarls.
• An icon for helping clanmates
You can now go to the Help Clansmen window right from the Global Map, as long as you don't have any active Onslaughts or marches and your Town is not located in Jotunheim.
Defend your Stronghold or go and attack an enemy's – the choice is yours! Discuss the update in the comments.
