[Config] Added file type to config to load files.
[Configs] Refactored config files to have one file to load other files which contain the data.
[Entity, MobileEntity] Added default constructor to Entity and MobileEntity.
[GameManager, SDL Widget Container] Changed file to load. Small format thing that was driving me crazy.
Rewritting pathfinding again because things are not working right.
[Config, Entity] Added "res/" to file loading. Added set/get for target and sight range.
Fixed errors in config files.