Update v1.04 - Small update

A small update to implement some balance changes. Mainly to make stamina more forgiving. [h3]Change Log:[/h3] -The player now has infinite stamina and sprint while in an area with no enemies. -Slightly reduced stamina cost for sprinting. -Slightly increased stamina recovery speed. -Reduced difficulty of summons for the Dungeon Lord boss in Dungeon Escape mode. -Slightly increased the amount of items that spawn on floor 9 of Dungeon Escape mode. -Increased chances of getting other types of ammo besides pistol ammo as the floor level increases in Dungeon Escape mode.