Docs: replacement for creating a distribution screenshot is needed

[Kathy Lussier]

The screenshot for creating distributions at http://docs.evergreen-ils.org/2.6/_creating_a_distribution.html isn't ideal. We need a new screenshot to replace this one.

[Lynn Floyd (lfloyd)]

Here is a cleaner image to add.
https://www.dropbox.com/s/7sb08rhwv5p7ljq/ascv-distr.jpg?dl=0

[Remington Steed (rjs7)]

Thanks Lynn for the larger image. I decided to use the screenshots from Sitka's documentation (http://docs.sitka.bclibraries.ca/Sitka/sitka_2_6/html/managing-serials-records.html#distribution), since they are more specific for the given instructions. But I certainly appreciate you giving attention to this bug!