move everything out of layout

src/lib.rs

@@ -7,17 +7,13 @@ mod default;
 mod event;
 mod widget;
 
-pub use iris_core::*;
-pub use iris_macro::*;
-
 pub mod prelude {
     use super::*;
     pub use default::*;
     pub use event::*;
+    pub use iris_core::*;
     pub use iris_macro::*;
-    pub use layout::*;
-    pub use render::*;
     pub use widget::*;
 
-    pub use super::util::Vec2;
+    pub use iris_core::util::Vec2;
 }