I added documentation for how to install for symfony 2.0. The bundle currently doesn't seem to use anything that doesn't work post 2.0, so no need to branch yet.
Another thing I did was point to the official PHPExcel repository, which is constantly updated. I would have done it in the composer file as well, but I didn't want to break anything in case I did it improperly since I'm not able to test it.
You might want to clean up the file structure of the streamwriter repo. The namespace doesn't look terribly pretty in the autoloader.
Fix code standard issues in example code
Add instructions for symfony 2.0
Thanks for this great job.
I created issues for StreamResponse #22 and PHPExcel #23.
Thanks to you I'm going to tag this one as stable 0.9.0
The 1.0.0 will be created when this repo will point to the Official PHPExcel.