Initial (compiling) changes for byte streams.

The HTTPRequestHandler 'read' method has been modified to read bytes
into a buffer. The FileRequestHandler implementation does nothing and
returns 0, for now.
Fully implemented byte streaming files. Fixes #8.

I finally did away with the (idiotic, I know) character streaming. Now
binary files are served without a hitch. In fact, serje can now serve
its own documentation! (lame)