tomcat 8.0.0-RC5 -> 8.0.0-RC10 and 7.0.47->7.0.50
spring 3.x -> 4.0.0.RELEASE
introduced glassfish-4.x-ds profile (datasource proxy on glassfish 4)
Merge pull request #10 from p6spy/pb_unstable

tomcat + spring updates; glassfish-4.x-ds introduced