Support for conversion of whole lists at once, or to 'nudge' conversion into specific UTM zone

[pyotyr]

I use your library in most of the code I write. I usually convert over 50 coordinates at once. Usually from LatLon first to UTM then back again to LatLon to save.

I have a problem: when the LatLons are on a border between 2 UTM zones, some of the coordinates are in one zone and the others are in a different zone. If I could pass a whole list or array at once, then the code could output everything in the same UTM zone. Alternatively, when converting a single point at a time you could pass a parameter for what UTM zone you would prefer it to output in.

I'm down to modify the library myself but I have never modified libraries before so I'd like to figure out the best way to go about it.

Thanks!