kyuba.org - unix init and low-level libraries

Not much of a code update, but some additional documentation. This release also fixes some of the cross-compilation issues, although not all of them, it supports c++ (with a curie++) and it fixes up some of the headers by hiding 'internal' ones (internal headers being headers that are only used to implement curie itself, and should thus not be used by users).

It also adds a 'hosted' compilation mode, which compiles an API-compatible library which can be linked to instead of the plain libcurie if functionality from the host libc is needed by the programme.