Yet more issues snapping

[Gareth France]

Having given up all hope of ever being able to do a simple thing like 
include pygtk in a snap I have rebuilt my package using wx. I can't face 
the same issue twice, surely right?


Well I've built it without explicitly mentioning wx, and specifically 
asking travis to include it. The end result is always a failure. Could 
someone please take a look at this and tell me what on earth is going on?


https://paste.ubuntu.com/23812998/