Multioutputcollector
some attempts
Merge branch 'multicast' of https://github.com/mbalassi/incubator-flink into multicast
some work
Merge branch 'multicast' of https://github.com/mbalassi/incubator-flink into multicast
spargel multicast started
Message with header.
Multicast 1, phase 1: message with header sent
some refactor
A version for Marci: messages are packed correctly, unpacking is not yet done.
Some cleaning.
conflict resolved