Correct long standing bug in SyncRecv.
wscript: Fix build error when sys.platform == linux3

Some python implementations report "linux3" on newer kernels. Of course,
we'll have to set IS_LINUX for those, too.
Open one virtual in/out in CoreMidi driver, fix a state refresh issue.
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of git://github.com/jackaudio/jack2 into netjack-dev

Conflicts: (resolved)
	common/JackNetDriver.cpp
Merge branch 'netjack-dev' into dev