document Channel.Supply, Promise.Supply

Also add link to concurrency doc

Closes #366

doc/Type/Channel.pod

@@ -20,6 +20,8 @@ one or more producers to one or more consumers.
     $c.close;
     say $c.list;
 
+Further examples can be found in the L<concurrency page|/language/concurrency#Channels>
+
 =head1 Methods
 
 =head2 method send
@@ -129,6 +131,20 @@ Closes the channel (that is, makes subsequent C<send> calls die), and enqueues
 the error as the final element in the channel. Method C<receive> will throw
 the error as an exception.
 
+=head2 method Supply
+
+Defined as:
+
+	method Supply(Channel:D:)
+
+Usage:
+
+	CHANNEL.Supply
+
+This returns an C<on-demand> L<Supply|Supply> that emits a value for every value 
+received on the Channel. C<done> will be called on the C<Supply> when the L<Channel>
+is closed.
+
 =head2 sub await
 
 Defined as:

doc/Type/Promise.pod

@@ -46,6 +46,8 @@ the C<vow> method to get a unique handle, and call C<keep> or C<break> on it:
     }
 =end code
 
+Further examples can be found in the L<concurrency page|/language/concurrency#Promises>.
+
 =head1 Methods
 
 =head2 method start
@@ -232,6 +234,14 @@ exception of type C<X::Promise::Vowed>.
     $vow.keep;
     say $p.status;          # Kept
 
+=head2 method Supply
+
+	method Supply(Promise:D:)
+
+Returns a L<Supply> that will emit the C<result> of the L<Promise> being Kept
+or C<quit> with the C<cause> if the L<Promise> is Broken.  
+
+
 =head2 sub await
 
     multi sub await(Promise:D)

doc/Type/Supply.pod

@@ -41,6 +41,8 @@ The L<live method|#method live> returns C<True> on live supplies. Factory
 methods such as L<interval|#method interval>, L<from-list|#method from-list>
 will return I<on demand> supplies.
 
+Further examples can be found in the L<concurrency page|/language/concurrency#Supplies>.
+
 =head1 Methods that return Taps
 
 =head2 method tap