Added README

Author: robharrop

README.md

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+Application demonstrating an AngularJS client talking to a Spring REST-powered backend.
+
+## Building
+
+To build the WAR file simply run `mvn package`. This puts the WAR
+file in `target/spring-angularjs.war`.
+
+You can deploy this WAR in any servlet container.
+
+## Running
+
+You can run the app in Jetty using `mvn jetty:run`.
+
+Once started, the app is available at `http://localhost:8080`.