Updated error handling in event engine; Two types of errors: system and game
Added event mappings for hero and items
Updated hero mode inventory field to fix bug
Added hero service methods to handle items
[web] added game error handling logic
[web] items are now hidden when picked up
[web] added inventory refresh on hud
Inventory items are loaded at startup
Inventory items are loaded at startup
[server] hero current health is updated correctly on item pickup
[web] hud messages shown
[server] remove comments
[web] updated style and messages output
Added map obstacles
[web, server] Added ability to drop item
[web] Added code for building on fields map
Online heroes are loaded when game starts