Move files from dat folder to metadats

metadat/headered/Atari - 7800.dat

@@ -1,6 +1,6 @@
 clrmamepro (
 	name "Atari - 7800"
-	description "Atari - 7800"
+	description "Atari - 7800 with Headers"
 	version 20140326-040142
 	comment "no-intro | www.no-intro.org"
 )

metadat/headered/Nintendo - Nintendo Entertainment System.dat

@@ -4,7 +4,7 @@ clrmamepro (
 	category "Standard DatFile"
 	version "2019.5.27"
 	date "2019-05-27"
-	comment "no-intro | www.no-intro.org - TODO: Move this to /metadat/headers"
+	comment "no-intro | www.no-intro.org "
 )
 
 game (