genlib/fifo: same 'level' semantics between SyncFIFOBuffered and FWFT SyncFIFO
genlib/fifo/SyncFIFOBuffered: replace not supported
actorlib/structuring: add reverse parameter to Unpack and Pack
flow/actor: add packetized parameter for Sink and Source
flow/actor: fix eop direction
add travis-ci description
README.md: add travis-ci badge