Mainly: CLX backends lives in its own package.
Mainly: CLX backends lives in its own package.

- added EXT: prefix to stream-read-char
- removed some #+NIL'ed code
- events.lisp before ports.lisp
- added Backends/CLX/package.lisp
- commented out Backends/CLX/image and Backends/CLX/clim-extensions,
  since I broke them

antifuchs/mcclim,antifuchs/mcclim,swflint/McCLIM,onixie/mcclim,swflint/McCLIM,onixie/mcclim,swflint/McCLIM,slyrus/mcclim,onixie/mcclim,slyrus/mcclim