Update Windows installer & buildno for 2.1 final.

PCbuild/BUILDno.txt

@@ -33,6 +33,8 @@ How to change the Windows build number:
 
 Windows Python BUILD numbers
 ----------------------------
+  15    2.1
+        16-Apr-2001
   14    2.1c2
         15-Apr-2001
   13    2.1c1

PCbuild/python20.wse

 Document Type: WSE
 item: Global
   Version=5.0
-  Title=Python 2.1 release candidate 2
+  Title=Python 2.1
   Flags=00010100
   Languages=65 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
   Japanese Font Name=MS Gothic
@@ -66,7 +66,7 @@ item: End Block
 end
 item: Set Variable
   Variable=APPTITLE
-  Value=Python 2.1 release candidate 2
+  Value=Python 2.1
 end
 item: Set Variable
   Variable=GROUP

PCbuild/pythoncore.dsp

@@ -739,11 +739,11 @@ SOURCE=..\Modules\getbuildinfo.c
 
 !IF  "$(CFG)" == "pythoncore - Win32 Release"
 
-# ADD CPP /D BUILD=14
+# ADD CPP /D BUILD=15
 
 !ELSEIF  "$(CFG)" == "pythoncore - Win32 Debug"
 
-# ADD CPP /D BUILD=14
+# ADD CPP /D BUILD=15
 
 !ELSEIF  "$(CFG)" == "pythoncore - Win32 Alpha Debug"