Try fix issue with only on class name

Try fix  logic based on class name, and change it on nib or reuseIdentifier. Now i can create some classes for other reuseidentifiers. Trouble described [this issue](https://github.com/Raizlabs/RZCellSizeManager/issues/27)
And spaces inside conditional predicate: `( overrideWidth != _overrideWidth )`. Also, `override` should have two `r`s.