Introduce IsContainsNonLetterSymbols() to Word.cs
Word.cs -> property validation fixed
Scoreboard.cs -> AddPlayer() small refactoring
Utility.cs -> GetRandomWord() changed to SetRandomWord()
Utility.cs -> SetRandomWord() method params swapped and params validations fixed
Utility.cs -> Unnecessary commends removed
Resolve conflict -> Unit-Testing class TestScoreboard.cs
Resove conflict again
Merge branch 'master' of https://github.com/Hangman-5/High-Quality-Code-Teamwork
Resove conflict 3rd time