Change models
+ Added Levy-flight and Opposition-based techniques in Root.py
+ Fixed codes include levy-flight and opposition-based of:
+ QSA
+ HGSO
+ TWO
+ NMRA
+ PFA
+ SFO
+ SSO
+ Added new modified version of models based on Levy-flight:
+ LCBO (LevyLCBO)
+ SSDO (LevySSDO)
+ EO (LevyEO)
+ AEO (LevyAEO)
+ MRFO (LevyMRFO)
+ NMRA (LevyNMRA)
Change others
+ models_history.csv: Update history of meta-heuristic algorithms
+ examples: Added new examples tested base-version and levy-version of: LCBO, SSDO, EO, AEO, MRFO, NMRA
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