Upgraded Spring and related components.
Created "glassfish4" branch and updated pom.xml to experiment with this latest version of the server.
glassfish4 branch, v1.0.0-b27: first working version using Glassfish v4, Spring v4, and updated atmosphere and other components
Upgraded dependencies in pom.xml and fixed problem with Primefaces 4.0 FileUpload component (bug) by adding a custom rederkit in faces-config