Merge branch 'feature-kidnapping' into 'devel'

...on/game/kidnapping/common/gfx/arrow-left-down-pressed.png

.../game/kidnapping/common/gfx/arrow-left-down-unpressed.png

...mon/game/kidnapping/common/gfx/arrow-left-top-pressed.png

...n/game/kidnapping/common/gfx/arrow-left-top-unpressed.png

...n/game/kidnapping/common/gfx/arrow-right-down-pressed.png

...game/kidnapping/common/gfx/arrow-right-down-unpressed.png

...on/game/kidnapping/common/gfx/arrow-right-top-pressed.png

.../game/kidnapping/common/gfx/arrow-right-top-unpressed.png

core/assets/common/game/kidnapping/common/gfx/correct.png

core/assets/common/game/kidnapping/common/gfx/lineNESW.png

core/assets/common/game/kidnapping/common/gfx/lineNWSE.png

...ts/common/game/kidnapping/common/gfx/position-current.png

...ts/common/game/kidnapping/common/gfx/rules-background.png

...assets/common/game/kidnapping/common/gfx/tiles/house1.png

...assets/common/game/kidnapping/common/gfx/tiles/house2.png

...assets/common/game/kidnapping/common/gfx/tiles/house3.png

...assets/common/game/kidnapping/common/gfx/tiles/house4.png

...assets/common/game/kidnapping/common/gfx/tiles/house5.png

...assets/common/game/kidnapping/common/gfx/tiles/house6.png

...assets/common/game/kidnapping/common/gfx/tiles/house7.png