webserver.xotcl

- namespace changes: mostly due to marketing reasons, the naming of the top-level namespace changed from "xotcl2" to "next". reasons: xotcl is hard to pronounce for beginners, sounds like "exotic" (but who wants to program in an exotic language) has a certain stigma of strange namings (e.g. "instproc"), is seen as a precursor of tcloo, the top-level namespace ::xotcl2:: is not very nice either, the separation of framework and language is not clear.
We have now:
::next (the new object system, former ::xotcl2)
::next::core (framework, primitives)
::xotcl (former xotcl1)

- "::xotcl::use" no longer needed, use Tcl standard mechanisms instead
(e.g. "package req next"; "package req XOTcl", "namespace import ::next*")