Genie:  Use vfs poll result constants in Pipe.cc
Genie:  Pass plain reference to TriggerHandle()
Genie:  Reduce TriggerHandle dependency on Genie
vfs:  Add stream method set to filehandle
vfs:  Define stream_method_set
vfs, Genie:  Add stream poll primitive
vfs, Genie:  Add stream read primitive
vfs, Genie:  Add stream write primitive
Genie:  Call vfs::poll() primitive in select()
Genie:  Call vfs::read() in read() system call
Genie:  Call vfs::write() in write() system call
Genie:  Call vfs::write() in writev() system call
Genie:  Call vfs read/write in pump() system call
Genie:  Use vfs read/write in system console
Genie:  Axe RegularFileHandle read/write overrides
Genie:  Implement trigger filehandle write method
Genie:  Axe TriggerHandle::Write()
Genie:  Devirtualize StreamHandle::Write()
Merge branch 'stream-methods'