Added docs for X::Seq::Consumed

Author: Jan-Olof Hendig

doc/Type/X/Seq/Consumed.pod

@@ -0,0 +1,12 @@
+=begin pod
+
+=TITLE class X::Seq::Consumed
+
+=SUBTITLE Error due to trying to reuse a consumed sequence
+
+    class X::Seq::Consumed is Exception { }
+
+This exception is thrown when a piece of code tries to reuse 
+a C<Seq> which has already been iterated.
+
+=end pod

type-graph.txt

@@ -264,6 +264,7 @@ class X::HyperOp::NonDWIM           is Exception
 class X::Set::Coerce                is Exception
 class X::StubCode                   is Exception
 class X::Eval::NoSuchLang           is Exception
+class X::Seq::Consumed              is Exception
 
 [Exceptions]
 # Exceptions: Numbers