Merge branch 'feature-encyclopedia-devel' into 'devel'

...ssets/text/screen/encyclopedia/encyclopedia_de.properties

build.gradle

core/assets/de/screen/encyclopedia/auditory_distinction.json

core/assets/de/screen/encyclopedia/dysgraphia.json

core/assets/de/screen/encyclopedia/dysorthographia.json

core/assets/de/screen/encyclopedia/famous_dyslectics.json

core/assets/de/screen/encyclopedia/seriality.json

...e/screen/encyclopedia/specific_learning_disabilities.json

core/assets/de/screen/encyclopedia/verbal_skills.json

core/assets/de/screen/encyclopedia/visual_distinction.json

core/assets/sk/screen/encyclopedia/famous_dyslectics.json

core/assets/sk/screen/encyclopedia/introduction.json

...ssets/sk/screen/encyclopedia/sfx/auditory_distinction.mp3

core/assets/sk/screen/encyclopedia/sfx/auditory_memory.mp3

core/assets/sk/screen/encyclopedia/sfx/dysgraphia.mp3

core/assets/sk/screen/encyclopedia/sfx/dyslexia.mp3

core/assets/sk/screen/encyclopedia/sfx/dysorthographia.mp3

core/assets/sk/screen/encyclopedia/sfx/famous_dyslectics.mp3

core/assets/sk/screen/encyclopedia/sfx/introduction.mp3

core/assets/sk/screen/encyclopedia/sfx/memory.mp3