UITableView row/section count verification, Log message plurality

## UITableView row/section count verification

I've added two new factory methods to `KIFTestStep` to allow for verification of the number of sections or the number of rows in a given section in a `UITableView` with a given accessibility label.

I needed these to properly test the users ability to "clear" the content of a `UITableView`, as well as a clean way to test the case of a user deleting a single row from a `UITableView`.

## Log message plurality

I went through and made all of the words properly pluralize/not-pluralize themselves based on the value they are representing. (Basically just made it auto add/remove the "s").