add offset / scrolling + clipboard support

src/lib.rs

@@ -3,7 +3,6 @@
 #![feature(const_trait_impl)]
 #![feature(const_convert)]
 #![feature(map_try_insert)]
-#![feature(trait_alias)]
 #![feature(unboxed_closures)]
 #![feature(fn_traits)]
 #![feature(const_cmp)]