Merge pull request gotk3#710 from diamondburned/stalone/add/glist-fns

Add extra GList functions

Merge pull request gotk3#710 from diamondburned/stalone/add/glist-fns

Add extra GList functions

Merge pull request gotk3#678 from diamondburned/add/list-store-insert

Add a binding for gtk_list_store_insert

Merge pull request gotk3#661 from hfmrow/hfmrow-patch-8

Update gtk.go with GtkImage methods using GIcon

Merge pull request gotk3#520 from cubiest/bugfix/PR510

Use native types directly