[proposal] Link to function reference proposal

Author: rossberg

README.md

@@ -1,4 +1,4 @@
-[![Build Status](https://travis-ci.org/WebAssembly/multi-value.svg?branch=master)](https://travis-ci.org/WebAssembly/reference-types)
+[![Build Status](https://travis-ci.org/WebAssembly/reference-types.svg?branch=master)](https://travis-ci.org/WebAssembly/reference-types)
 
 # Reference Types Proposal for WebAssembly
 

proposals/reference-types/Overview.md

@@ -140,6 +140,8 @@ Questions:
 
 ### Typed function references
 
+See the [typed function references proposal](https://github.com/WebAssembly/function-references/blob/master/proposals/function-references/Overview.md)
+
 Motivation:
 
 * Allow function pointers to be expressed directly without going through table and dynamic type check.
@@ -167,13 +169,6 @@ Additions:
   - optional for backwards compatibility, defaults to `null`
 
 
-Question:
-
-* General function have no reasonable default, do we need scoped variables like `let`?
-* Should there be a down cast instruction?
-* Should there be depth subtyping for function types?
-
-
 ### Type Import/Export
 
 Motivation: