Addded class for Formation: abstract class Formation and the 4-4-2 Formation class
Added comments in Game, And methods in Formation to set new players in positions and return the old one in that position
Merge branch 'ft-GUIDesign' into ft-Save
Added formation variable to Team and a method to change the formation type
changed DefinePlayrounds in definePlayrounds
fixed errors
Merge branch 'ft-Save' into ft-GUIDesign