JAVA: Add Maven support for the libphonenumber demo.

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.

Committed: http://code.google.com/p/libphonenumber/source/detail?r=409

[shaopengjia, 2011-12-07 14:13:35]

http://codereview.appspot.com/5405041/diff/1/java/demo/pom.xml
File java/demo/pom.xml (right):

http://codereview.appspot.com/5405041/diff/1/java/demo/pom.xml#newcode8
java/demo/pom.xml:8: <version>4.3-SNAPSHOT</version>
please update the versions here, and the few places below (sorry for getting to
this so late :P )

[philippe, 2011-12-08 13:01:38]

http://codereview.appspot.com/5405041/diff/1/java/demo/pom.xml
File java/demo/pom.xml (right):

http://codereview.appspot.com/5405041/diff/1/java/demo/pom.xml#newcode8
java/demo/pom.xml:8: <version>4.3-SNAPSHOT</version>
On 2011/12/07 14:13:35, shaopengjia wrote:
> please update the versions here, and the few places below (sorry for getting
to
> this so late :P )

Done.

[Shaopeng, 2011-12-08 13:06:05]

LGTM