Pr/90

There is no logical changes.
Only code-cleanup.
Here the main changes:

-  move all "magic numbers" to explicit-named constants (enums). It should simplify future development process and eliminate potential mistakes.

- replace magic numbers to standart enum values like 0 -> NSTextAlignmentLeft

- update code to modern syntax like [NSNumber numberWithFloat:labelYAxis.center.y] -> @(labelYAxis.center.y)

- rename ArrayOfValues to arrayOfValues according apple coding style guides.