Made FairCycling a generic Class + some performance improvements + some minor fixes

src/example/philosophes/MainPhilosophe.java

src/example/philosophes/Philosopher.java

src/mas/core/Sleepable.java

src/mas/implementation/schedulers/FairCycling.java

src/mas/implementation/schedulers/FairPosCycling.java

src/mas/implementation/schedulers/ThreeStepCycling.java

...mas/implementation/schedulers/variations/TwoDCycling.java