remove dependency of Jetty
add WebSocket for tracking dom and events
use stomp as sub protocol
upgrade spring boot to 1.1.5
send dom change to kafka
switch report to scala
exclude log4j from dependencies
exclude log4j-over-slf4j from dependencies
exclude slf4j-simple from dependencies
set scala version to 2.10.1 to match kafka's dependencies
switch to  scala  2.10.1 and java 7
roll back vds-common-api to java 7
change heroku's java to 1.7