Updated HttpCompress for .NET 2

I just pushed out an updated version of
HttpCompress
that replaces #ziplib with the built-in compression classes provided by
the .NET 2 class library. If you’re running on 2.0, give it a go and
see how it performs.

I’ve done only minor smoke testing at this point, so I have no idea
if this will perform better or worse than #ziplib. The framework
classes do not appear to allow you to set the compression level, so
I’ll probably release any version sometime soon that allows you to
choose what underlying compression engine you’d like to use.

Also, if anyone has any outstanding bug fixes for the compression module, send them along and I’ll get them worked into the source. Thanks!