- Moves are validated properly
 - Not valid moves are not executed
 - Passing move to oher plyers works properly

 - Created main loop in game execution
 - No Error handling (only error info)
 - Awaiting for tests

 - Created IPlayer class to communicate with user
 - Errors caused by cyclic includes
 - Minor cleanups

 - Creation of MainRule object from SyntaxTree
 - Checking conditions to stop the game
 - Settig payoffs for players

Hopefully it's the last touch to instuctions

Added conditional jump object

Execution of INT operations
Scopes of data (local, state, move)
No control flow yet
Compiler object neads refactoring
No proper error handling (bad syntax of source code may crush compiler)

Scope of variables
Possibility of empty lists of instructions and variable declarations
Setup instruction block for STATE

New file 'VarType' to track types in enum

New Compiler class that handles compilation process