Pass the @options.bindContext into functions that are evaluated during

Binding::set.

@@ -55,7 +55,7 @@ class Rivets.Binding
   # with the suplied value formatted.
   # with the suplied value formatted.
   set: (value) =>
   set: (value) =>
     value = if value instanceof Function and !@binder.function
     value = if value instanceof Function and !@binder.function
-      @formattedValue value.call @model
+      @formattedValue value.call @model, @options.bindContext
     else
     else
       @formattedValue value
       @formattedValue value