Add stringification methods on Mu.

Author: GlitchMr

lib/Mu.pod

@@ -28,6 +28,27 @@ Returns C<False> on the type object, and C<True> otherwise
 
 Returns C<False> on the type object, and C<True> otherwise
 
+=head2 Str
+
+    multi sub    Str(Mu) returns Str
+    multi method Str()   returns Str
+
+Returns implementation-defined identifier.
+
+=head2 gist
+
+    multi sub    gist(Mu) returns Str
+    multi method gist()   returns Str
+
+Returns result of using C<.perl> method on current object.
+
+=head2 perl
+
+    multi sub    perl(Mu) returns Str
+    multi method perl()   returns Str
+
+Returns parsable string which generates current class.
+
 =head2 clone
 
     method clone(*%twiddles)