#16 Moves character data (before the in classes SewerRat and Recruit)
into own CharacterRepository and file 'characters.json')
#2 Improves readability
#1 Adds test, createSewerRat from fields, for replacing the SewerRat
class
#18 Renames LocationRepository with WorldRepository
#16 Create new Player based on CharacterBuilder instance
#16 Adds field 'id'. Adds constructor based on many incoming arguments
(should become CharacterBuilder)
#16 Removes classes SewerRat and Recruit
#20 Adds type to item, so different items can be identified, like
weapon, food, armour, etc
#19 Replaces String weapon, with Item weapon
#18 Renames some variables and fields to worldRepo