Feature/HOF+Div&Conquer+Backtrack

1.High Order Functions Usage
2.Divide And Conquer  Algo + Examples
3.Recursive Simplif. Algoritm + Examples
3.Backtrack Algoritm + Examples
Merge pull request #1 from Jacobeom/Feature/HOF+Div&Conquer+Backtrack

Feature/HOF+Div&Conquer+Backtrack