Running a standard install of Gramps on Kubuntu 15.10 gives errors about missing packages. I found it a bit difficult to figure out exactly which packages should be installed to get to a state where Gramps doesn't raise these error messages. So, perhaps it would help other users if this info could be on this page, or if this page could have a link to this info.
Gramps 4.2.0 on Kubuntu 15.10
Gramps 5.0 on Kubuntu 15.10