Genie:  Clean up IO/Terminal.hh
Genie:  Remove Genie dependency in IO/Terminal.hh
vfs:  Add accessor functions for nonblocking flag
Genie:  Use {set,clear}_nonblocking() functions
Genie:  Axe StreamHandle::{Set,Clear}Nonblocking()
Genie:  Use vfs::is_nonblocking()
Genie:  Axe StreamHandle::IsNonblocking()
Genie:  Remove <fcntl.h> include from IO/Stream.hh
Merge branch 'nonblocking'