SLING-7167 Adjust READMEs

add uniform header linking to Sling project

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1810895 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/README.md b/README.md
index 4664850..82e6597 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,6 @@
-Support Jar for implementations of CacheManagerService.
+# Apache Sling Cache API Implementation support library
+
+This module is part of the [Apache Sling](https://sling.apache.org) project.
 
 This is support jar for implementing Cache services. It contains an abstract implementation of all the in
 memory versions of cache that the cache service has to supply leaving instance, cluster invalidated and cluster
@@ -9,4 +11,4 @@
 
 This code was based on a module from Sparse Content Map 29 September 2012 (git:sha1:a222df1937434ad3f07bf6c4f60b19524a158bcb), which itself was based on a snapshot of a 
 module in Sakai Nakamura 27 Jan 2011 (git:sha1:b9d8e65b733ec7c35a3d194c9a5dc12acf13cb34). All know contributors to code in this module have been
-contacted for permission to grant license to the Apache Foundation.
\ No newline at end of file
+contacted for permission to grant license to the Apache Foundation.