GitLab

- <package>/pacote renamed to <package>/package
- Package version stored inside <package>/package/DEBIAN/control, instead of
  <package>/VERSAO.
- Added script bin/build_package.sh, to centralize the script to build
  packages. In consequence, all gerar.sh were deleted*.
- COPYING and AUTHORS were centralized inside newly created doc/ directory.
  These files are copied into the package being build every time
  build_package.sh is called.

* If the gerar.sh had some special behavior on a specific package, this
extra computing can be made using a prebuild/postbuild script, which must be
located inside the <package>/ root directory.
Signed-off-by: Diego Giovane Pasqualin <dpasqualin@c3sl.ufpr.br>