Moved methods from EKArrayStuff, EKSortStuff, EKSearchStuff into categories of NSArray and NSMutableArray. Updated main file
Merge branch 'master' of https://github.com/vittoriom/EKAlgorithms into vittoriom-master

Conflicts:
	EKAlgorithms/EKAlgorithms/EKArrayStuff.h
	EKAlgorithms/EKAlgorithms/EKArrayStuff.m
	EKAlgorithms/EKAlgorithms/main.m