Merge pull request #85 from EPashkin/gtk_version

Fix building with upper gtk versions

Author: gkoz

Cargo.toml

@@ -19,8 +19,10 @@ git = "https://github.com/gtk-rs/gdk"
 git = "https://github.com/gtk-rs/gtk"
 
 [features]
+#default = ["gtk_3_18"]
 gtk_3_10 = ["gtk/v3_10"]
-gtk_3_18 = ["gtk_3_10"]
+gtk_3_16 = ["gtk_3_10", "gtk/v3_16"]
+gtk_3_18 = ["gtk_3_16"] #for CI tools
 
 [[bin]]
 name = "basic"