Metro web site migration

[m0mus]

Because of java.net closure the web site at metro.java.net is not available. It has to be migrated to https://javaee.github.io/metro.
We are apologising for inconvenience. I have created a simple web site using a new JavaEE template where documentation, users guide and download links are available. We continue working on migrating the old web site. Please be patient.

[bravehorsie]

In the meantime this links can be used to get documentation:

http://repo1.maven.org/maven2/org/glassfish/metro/getting-started/2.3.1/getting-started-2.3.1-docbook.zip
http://repo1.maven.org/maven2/org/glassfish/metro/guide/2.3.1/guide-2.3.1-docbook.zip

[russellhoff]

Thanks!!

[zhengjl]

@m0mus @bravehorsie @lukasj , I submitted a minor update for the description, can you please review it and let me know if there are other things need to be updated?