JAVA: Add Maven support for the libphonenumber demo.

That lets the demo be part of the libphonenumber Maven project thus adds the following benefits:
   - Automatically update the version of the demo and the libphonenumber artifact the demo depends on when performing a release.
   - Let Maven handle the deployment of the demo to AppEngine without any need to install the AppEngine SDK.
   - No need to push the dependency JARs (servlet, apache common fileupload/io) even if they are still here to let you use Ant if you prefer.

Note that this CL depends on CL 5395054.

Review URL: http://codereview.appspot.com/5405041

java/demo/README

@@ -0,0 +1,16 @@
+How to install the Appengine SDK to the Maven local repository?
+Note that this needs to be done only once.
+  $ mvn gae:unpack
+  Note that you don't need to manually download any SDK.
+
+How to generate the WAR?
+  $ mvn package
+  $ mvn war:war
+  Note that this must be done before running the webapp locally and before
+  deploying it to Appengine.
+
+How to run the webapp locally?
+  $ mvn gae:run
+
+How to deploy the webapp to Appengine?
+  $ mvn gae:update

java/demo/pom.xml

@@ -0,0 +1,103 @@
+<?xml version="1.0"?>
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <artifactId>libphonenumber-parent</artifactId>
+    <groupId>com.googlecode.libphonenumber</groupId>
+    <version>4.4-SNAPSHOT</version>
+  </parent>
+  <groupId>com.googlecode.libphonenumber</groupId>
+  <artifactId>demo</artifactId>
+  <version>4.4-SNAPSHOT</version>
+
+  <properties>
+    <gae.version>1.5.4</gae.version>
+  </properties>
+
+  <repositories>
+    <repository>
+      <id>mvnrepository</id>
+      <url>http://mvnrepository.com/artifact/</url>
+      <snapshots>
+        <enabled>true</enabled>
+      </snapshots>
+    </repository>
+  </repositories>
+
+  <dependencies>
+    <dependency>
+      <groupId>javax.servlet</groupId>
+      <artifactId>servlet-api</artifactId>
+      <version>2.5</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.commons</groupId>
+      <artifactId>commons-io</artifactId>
+      <version>1.3.2</version>
+    </dependency>
+    <dependency>
+      <groupId>commons-fileupload</groupId>
+      <artifactId>commons-fileupload</artifactId>
+      <version>1.2</version>
+    </dependency>
+    <dependency>
+      <groupId>com.googlecode.libphonenumber</groupId>
+      <artifactId>libphonenumber</artifactId>
+      <version>4.4-SNAPSHOT</version>
+    </dependency>
+    <dependency>
+      <groupId>com.googlecode.libphonenumber</groupId>
+      <artifactId>geocoder</artifactId>
+      <version>1.8-SNAPSHOT</version>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <sourceDirectory>src</sourceDirectory>
+    <testSourceDirectory>test</testSourceDirectory>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>2.3.2</version>
+        <configuration>
+          <source>1.6</source>
+          <target>1.6</target>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>net.kindleit</groupId>
+        <artifactId>maven-gae-plugin</artifactId>
+        <version>0.9.1</version>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-war-plugin</artifactId>
+        <version>2.1.1</version>
+        <configuration>
+          <warSourceDirectory>war</warSourceDirectory>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.mortbay.jetty</groupId>
+        <artifactId>maven-jetty-plugin</artifactId>
+        <version>6.1.10</version>
+        <configuration>
+          <webAppSourceDirectory>webapp</webAppSourceDirectory>
+          <scanIntervalSeconds>10</scanIntervalSeconds>
+          <webAppConfig>
+            <contextPath>/</contextPath>
+          </webAppConfig>
+          <connectors>
+            <connector implementation="org.mortbay.jetty.nio.SelectChannelConnector">
+              <port>8080</port>
+              <maxIdleTime>60000</maxIdleTime>
+            </connector>
+          </connectors>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+
+</project>

java/pom.xml

@@ -80,6 +80,7 @@
   <modules>
     <module>libphonenumber</module>
     <module>geocoder</module>
+    <module>demo</module>
   </modules>
 
   <build>

tools/java/data/README

@@ -4,9 +4,10 @@ Note that this needs to be done only once.
   Note that you don't need to manually download any SDK.
 
 How to generate the WAR?
-Note that this must be done before running the webapp locally and before
-deploying it to Appengine.
+  $ mvn package
   $ mvn war:war
+  Note that this must be done before running the webapp locally and before
+  deploying it to Appengine.
 
 How to run the webapp locally?
   $ mvn gae:run