ahat: update README and manifest for release 1.1

Test: m ahat-test, verify version shown in overview page is 1.1
Change-Id: Ib15c43d9c42a34e24d74afae0cb6481452962bb8
diff --git a/tools/ahat/README.txt b/tools/ahat/README.txt
index 08d41f0..133426f 100644
--- a/tools/ahat/README.txt
+++ b/tools/ahat/README.txt
@@ -75,6 +75,9 @@
  * Instance.isRoot and Instance.getRootTypes.
 
 Release History:
+ 1.1 Feb 21, 2017
+   Show java.lang.ref.Reference referents as "unreachable" instead of null.
+
  1.0 Dec 20, 2016
    Add support for diffing two heap dumps.
    Remove native allocations view.
diff --git a/tools/ahat/src/manifest.txt b/tools/ahat/src/manifest.txt
index 87a82b9..20245f3 100644
--- a/tools/ahat/src/manifest.txt
+++ b/tools/ahat/src/manifest.txt
@@ -1,4 +1,4 @@
 Name: ahat/
 Implementation-Title: ahat
-Implementation-Version: 1.0
+Implementation-Version: 1.1
 Main-Class: com.android.ahat.Main