Adding missing stuff to our website

Hi, Just added missing stuff as required by http://www.apache.org/foundation/marks/pmcs I also managed to refactor a bit the website in order to make it more maintainable. Hope I did not break anything. In case, please ping. There is still work to do, but ... -- Jean-Louis

Blog post - 1.5.2

Crafted up this post for announcing the 1.5.2 release: - http://blogs.apache.org/preview/tomee/?previewEntry=apache_tomee_1_5_2 States that 1.5.2 is a maintenance release and gives a slight teaser for the 1.6.0 release. Hope to publish it in the early afternoon Pacific time unless there are