Before users were limited to only use a appicon.png in the root directory.
Now the user is free to use any png anywhere on the system with the help of the -icon flag.
Signed-off-by: Axel Paulander <axel.paulander@gmail.com>
The `gio` name clashes with a widely deployed GNOME tool.
Rename our tool to `gogio`, "the go tool for gio programs".
Fixes gio#20
Signed-off-by: Elias Naur <mail@eliasnaur.com>