added introduction

src/kode/checkmate.cpp

@@ -30,6 +30,11 @@ int main()
 
 //    readFromFile();
  //   readFromFileTournament();
+    cout << endl << "Welcome to checkmate, a program for organizing chess tournaments. "
+    << "Please use a single character as shown in the text when interacting with the program. "
+    << "If you encounter any issues, please take contact with either the leader of the team, "
+    << "Loke Svelland at lokens@stud.ntnu.no, "
+    << "or the lead programmer, Sigrun Hogstedt at sigruah@stud.ntnu.no" << endl;
 
     do
     {