moved Eval theory to library

--- a/src/HOL/ex/ROOT.ML	Mon Mar 26 14:53:04 2007 +0200
+++ b/src/HOL/ex/ROOT.ML	Mon Mar 26 14:53:05 2007 +0200
@@ -8,7 +8,7 @@
 no_document use_thy "GCD";
 
 no_document time_use_thy "Classpackage";
-no_document time_use_thy "CodeEval";
+no_document time_use_thy "Eval_examples";
 no_document time_use_thy "CodeRandom";
 no_document time_use_thy "Codegenerator_Rat";
 no_document time_use_thy "Codegenerator";