Freshen README to 2015

git-svn-id: https://svn.apache.org/repos/asf/httpd/docs-build/trunk@1689894 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/README b/README
index 15fbf6c..e2f2778 100644
--- a/README
+++ b/README
@@ -1,4 +1,9 @@
-To completely rebuild the trunk/2.2 doccos, use:
+This repository is checked out into docs/manual/build
+of an httpd working tree to support documentation
+authoring, and works on all httpd branches from 2.0
+through trunk.
+
+To completely rebuild the docs, use:
 
       ./build.sh all convmap
 
@@ -10,7 +15,3 @@
 
       ./build.sh validate-xhtml
 
-For 2.0, use:
-
-      ./build.sh all
-