Allow rounding of numbers in output when quantities = TRUE

[jolars]

No description provided.

[jw5]

I would also find this very useful. Perhaps there could be an "ndigits" parameter or a printf style format specification added to the "quantities" list.

An additional feature associated with making the results look better would be a threshold size (either in counts or percent) below which the numeric labels wouldn't be output. Thus removing a huge scattering of "XXXX < 1%" visual noise.