* ../../../src/dim/vectorupdater/Easy.h: added Rewarding operator to split best from avg strategy
* ../../../src/dim/feedbacker/Easy.h: removed useless codes
* ../../../src/dim/algo/Easy.h: added a statement to take in account the stoping criteria but it doesnot work yet, still have to think about that see #185
* ../../../application/OneMax/onemax.cpp: fixed the issue in #173 + added new rewarding operators
* ../../../scripts/plotAnime.py: removed useless options and added an option to select the stats we want to display
* ../../../scripts/plot.py: removed useless options