sharing is false by default as of portal.js 1.0rc3
Apply incompatible changes
Use room.in and room.out
Change all the room name to 'room'
Use method name as event name
Use return type to achieve reply callback
Utilize data expression
Update portal to 0.4
Specialize example for portal-spring
Merge pull request #2 from flowersinthesand/master

Migration to 0.4