Dodelana hra (treti obrazovka), pridana testova zadani.
Merge backendu (aplikacni logika) a UI vrstev. (Adam+Daniel), vyreseni konfliktu.

Conflicts:
	StaroceskaSibenice-Android/app/src/main/java/cz/cvut/fel/pda/sibenice/GameActivity.java
	StaroceskaSibenice-Android/app/src/main/java/cz/cvut/fel/pda/sibenice/JoinGameActivity.java
	StaroceskaSibenice-Android/app/src/main/java/cz/cvut/fel/pda/sibenice/fragments/GameScreenFragment.java
	StaroceskaSibenice-Android/app/src/main/res/layout/game_fragment.xml
fixy