New game mode: Barbarian Raids ("tower defense" mode)

Hi guys,

new update 1.0.50 has been released

this update contains new game mode: Barbarian Raids

bugfixes and improvements: !+ improved catapults AI !+ fixed buildings issues !+ fixed price for the first belfry !+ fixed smoke after buildings/walls !+ fixed many small bugs

• removed objects titles on the map (config: view_map_object_titles)