Windows|Shell|GUI: Application icon
Merge branch 'master' of ssh://github.com/skyjake/Doomsday-Engine
qmake|Fixed: QtWidgets is only for Qt 5
Fixed|GCC|Clang: Various compiler warnings

Mostly related to thinker function pointer types in plugins.
Fixed|Windows: More compiler warnings

Warnings about unused function parameters were disabled.
Windows|Shell|GUI: App icon is defined in the RC file
Refactor|Network: Applied the pimpl macro in MasterWorker
Shell|GUI: Setting a name for the server

The name of a local server can now be specified when the server is
started.
Fixed|libshell: Escape quotes in LocalServer's name
Cleanup
Merge branch 'master' into mapdata-c++

Conflicts:
doomsday/client/src/map/dam_file.cpp
doomsday/client/src/map/polyobj.cpp
Refactor|FakeRadio: Cleaned up FakeRadio geometry construction somewhat
LineDef: Added getter methods for all LineDef property values