- almost finished unit testing for scoreboard class
-implemented error handling for trying to sign to scoreboard with a null string
-implemented functionality for avoiding duplicate keys(names) in scoreboard
Merge branch 'master' of https://github.com/PetarPenev/Teamwork-Team-Samarium.git

Conflicts:
	HangmanProject/Hangman/bin/Debug/Hangman.exe
	HangmanProject/Hangman/bin/Debug/Hangman.pdb
	HangmanProject/Hangman/obj/Debug/Hangman.exe
	HangmanProject/Hangman/obj/Debug/Hangman.pdb
	HangmanProject/HangmanProject.v11.suo