Merge branch 'devel' into feature-createuser

core/src/cz/nic/tablexia/TablexiaSettings.java

core/src/cz/nic/tablexia/debug/DebugInfo.java

core/src/cz/nic/tablexia/game/AbstractTablexiaGame.java

core/src/cz/nic/tablexia/game/GameDefinition.java

core/src/cz/nic/tablexia/game/difficulty/GameDifficulty.java

core/src/cz/nic/tablexia/game/games/robbery/GameScreen.java

...src/cz/nic/tablexia/game/games/robbery/RobberyScreen.java

core/src/cz/nic/tablexia/game/games/robbery/RuleScreen.java

core/src/cz/nic/tablexia/screen/AbstractTablexiaScreen.java

...c/cz/nic/tablexia/screen/gamemenu/pages/GameMenuPage.java

core/src/cz/nic/tablexia/screen/loader/LoaderScreen.java

...cz/nic/tablexia/screen/preferences/PreferencesScreen.java