Simple fix to get this mod working in Factorio 1.1:
1) Change the value of "factorio_version" in info.lua to "1.1":
"factorio_version": "1.1",
2) Replace line 1 of control.lua with this:
-- As of Factorio 1.1.0, mod-gui.lua doesn't set the global variable mod_gui anymore!
-- require("mod-gui")
local mod_gui = require("mod-gui")
That seems to be all that's needed to get the mod working again! :-)
