Add OWNERS to Jinja2 (Python template library)

Jinja2 package is missing OWNERS; I've added one as per: 
http://www.chromium.org/developers/adding-3rd-party-libraries#TOC-Add-OWNERS

Split off from:
Update Jinja2 (Python template library) to 2.7.1
https://codereview.chromium.org/23506004/

TBR=cpu@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23537008

Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 367fb653f4e316d9a095f3c29c7baf03b21ffb78
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..8edbdf8
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,3 @@
+timloh@chromium.org
+haraken@chromium.org
+nbarth@chromium.org
diff --git a/README.chromium b/README.chromium
index a97abd5..8babd69 100644
--- a/README.chromium
+++ b/README.chromium
@@ -10,4 +10,6 @@
 Template engine for code generation in Blink.
 
 Local Modifications:
-This only includes the jinja2 directory from the tarball and the LICENSE and AUTHORS files. Unit tests have been removed.
+This only includes the jinja2 directory from the tarball and the LICENSE and
+AUTHORS files. Unit tests have been removed. Additional chromium-specific files
+are this README.chromium and OWNERS.