Add simple README
diff --git a/README.markdown b/README.markdown
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+<!--
+    Licensed to the Apache Software Foundation (ASF) under one
+    or more contributor license agreements.  See the NOTICE file
+    distributed with this work for additional information
+    regarding copyright ownership.  The ASF licenses this file
+    to you under the Apache License, Version 2.0 (the
+    "License"); you may not use this file except in compliance
+    with the License.  You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing,
+    software distributed under the License is distributed on an
+    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+    KIND, either express or implied.  See the License for the
+    specific language governing permissions and limitations
+    under the License.
+-->
+
+Apache Allura (incubating)
+==========================
+
+Allura is an open source implementation of a software "forge", a web site that manages source code repositories, bug reports, discussions, mailing lists, wiki pages, blogs and more for any number of individual projects.
+
+To install Allura, see INSTALL.markdown
+
+Website: <https://forge-allura.apache.org/p/allura/>
+
+To find more documentation, ask a question, file a bug, or contribute a patch, see the links on our website.  If you're not sure where to start, join the mailing list and ask.
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