Rename module/namespace

[trappist]

I realize this would be a disruptive change, but I have to maintain my own fork with the Business module renamed to BusinessDay because my application has a class named Business. Probably not a common problem, but I think a best practice would be to establish a namespace that's more specific and descriptive, and as such less likely to conflict with other code. Happy to submit a PR if there's any interest in pursuing this.

[grillermo]

A more common problem than you think, a pretty common word.
A fork up to date with the module rename to BusinessDay here.