added jetty as an alternative lightweight http-server
added jetty as an alternative lightweight http-server

UAK-35/wro4j,dacofr/wro4j,wro4j/wro4j,dacofr/wro4j,UAK-35/wro4j,wro4j/wro4j,dacofr/wro4j,wro4j/wro4j,UAK-35/wro4j,UAK-35/wro4j,dacofr/wro4j