Add user option to control spacing between items.

[JohnLukeBentley]

... An issue arising at #77 (comment)

[aaFn]

Hello @JohnLukeBentley , 2.0.49 is out with the feature. Let me know.

[JohnLukeBentley]

Seems to be working perfectly. You can close this issue. Thanks very much!

[aaFn]

Ok, thank you :-)