Guild upgrades - v0.3.0

v0.3.0 changelog:

• added guild building upgrades: archive, training room, intelligence room, workshop, seer's room
• their functions are described in the new guild hall screen
• they have a single time cost, an activation cost and a daily upkeep, but also provide a bit of reputation in addition to their functions
• quest progress can no longer be seen instantly, but you can use messenger ravens or hire a seer to get updates on quests daily/immediately
• current state of adventurers and their gear is now also hidden while they are away on quests
• adventurers with high charisma and certain personality traits can now negotiate better prices for repairs and consumables
• prices of repairs and consumables are now affected by the town's prosperity (low prosperity = higher prices)
• rebalanced danger levels and their relation to prosperity (tested to be manageable up to at least 120-150 days), massively increased the effect of extermination quests on lowering danger levels
• fixed a bug causing the crime level to never increase
• fixed some images, started replacing weapon icons with zoomed in versions

This patch grew in scope so much, that the first "mid-game" quests will be in the next patches.