stream implementation for interpreter backend
stream implementation for interpreter backend

Ignore-this: 2b9d383b6b65fa2252b8708499ffed8a

darcs-hash:20101214061045-dcabc-93f24940ca859fc4f69426d70a83957ee64c89ef.gz

robeverest/accelerate,wilbowma/accelerate,wilbowma/accelerate,robeverest/accelerate,sjfloat/accelerate,rrnewton/accelerate