Completing rename of unwrap() --> unwrapped()
Disabling force-inline attribute for gcc < 4.5 (this causes problems in dataflow unit tests otherwise)
Fix a dataflow compilation issue for older compilers
compiling dataflow_future_swawp2 test only on compilers with lambda support
Removing unused variable
Reverting earlier commit wrt force-inline, removed BOOST_FORCEINLINE in one spot as it troubles even newer gcc versions