Reorganized folders to separate tests from source code.
Added failing test about 6 players and reorganised characterisation test.
Fixed the 6 players issue and the characterization test number
Removed unused code
Added test for wrong message 'Answer was corrent'
Fixed message, reused method and changed characterization numbers
Rebuild string concatenation using String.format before externalizing Strings
Inlined message extracted 'Answer was correct', befor externalizing Strings
Externalized messages and fixed bug in String comparison using ==