Adding in documentation stubs

Author: Pauan

src/lib.rs

@@ -166,6 +166,7 @@ pub use webcore::number::Number;
 pub use webcore::object::Object;
 pub use webcore::array::Array;
 pub use webcore::symbol::Symbol;
+pub use webcore::cancel::{Cancel, AutoCancel};
 
 pub use webcore::unsafe_typed_array::UnsafeTypedArray;
 pub use webcore::once::Once;

src/webcore/cancel.rs

@@ -1,11 +1,14 @@
 use std::ops::{Deref, DerefMut};
 
 
+///
 pub trait Cancel {
+    ///
     fn cancel( &mut self );
 }
 
 
+///
 #[must_use = "
 
      The AutoCancel is unused, which causes it to be immediately cancelled.
@@ -21,11 +24,13 @@ pub trait Cancel {
 pub struct AutoCancel< A: Cancel >( Option< A > );
 
 impl< A: Cancel > AutoCancel< A > {
+    ///
     #[inline]
     pub fn new( canceler: A ) -> Self {
         AutoCancel( Some( canceler ) )
     }
 
+    ///
     #[inline]
     pub fn leak( mut self ) -> A {
         self.0.take().unwrap()

src/webcore/promise.rs

@@ -105,7 +105,7 @@ impl Promise {
     /// no longer interested in the `Promise`'s result.
     ///
     /// But if you *are* interested in the `Promise`'s result, then you either need to make sure to keep the handle
-    /// alive until after the callback is called, or you need to use the `leak` method.
+    /// alive until after the callback is called, or you need to use the [`leak`](struct.AutoCancel.html#method.leak) method.
     ///
     /// Cancelling the [`DoneHandle`](struct.DoneHandle.html) does ***not*** cancel the `Promise`, because promises
     /// do not support cancellation.