Can I change background color of text in some range?

I'd like to add(or change) background color for text in a certain range. Is it possible with the current version of OHAttributedLabel?
iOS 6's NSAttributedString supports NSBackgroundColorAttributeName attribute, but my app should support at least iOS 5.0 so it's not an option.

[AliSoftware]

ref #148 ?

Don't hesitate to propose a PR for that, at least to propose a commodity method for setting NSBackgroundColorAttributeName