Small Reafctoring.
1. Used self.scrollView as lazy attribute.
2. Removed unused "frame" parameter from buildUI and buildScrollView methods. self.frame was already used instead.
3. Moved InroView configuration from initialization methods to separate method.
4. Getters and setters with "." if was possible.
5. Used backgroundImageView properties as lazy attributes.
Merge pull request #15 from ealeksandrov/small-refactoring

Some refactoring