add ability to display "Show x records on a page"

[brandonzylstra]

related to issue #56

[mlangens]

Hi @brandondrew! I'm helping @JangoSteve with Dynatable. We're getting ready to move forward with a lot of overdue work! We're having a meeting about all open PRs next week. We do require that all contributors sign the CLA. Are you available to do so?

[JangoSteve]

Good point, and that's a great book!

This looks good, except that if not suffix is specified, it still appends a blank span. I'd maybe make the default value null instead of empty string, and then only append the suffix span if present.