lib/cave: minor change to coding style. Add FIXMEs
lib/dpkg: add FIXME
README: Add #cave (Exherbo Linux) support, by Somasis
Clean up and update list of Authors and copyright information

* Rename (lib/help.sh) -> (lib/help.txt). The compile script knows this
* Remove THANKS. All contributors are not listed in AUTHORS section
* Update copyright information in the compiled version of the script