[program] add icon to window and program file, add icon.pg, icon.ico, add icon.rc
[MEA] delete QOBJECT and obsolete signal, delete obsolete methods - printAgents, printBestFitAndAgentSize, testEliteSize
[EliteList] delete obsolete methods
[AgentSudoku] delete obsolete methods
[MEA, constants] replace old define constants by new enum constants
[MEAsudoku] update some method to const, some parameters to const, remove some obsolete parameters
[SudokuThread] when solution is not found, time is also printed
Merge branch 'fix-someSmallFixes' into develop
Merge branch 'fix-refactoringMEA' into develop