1/ setuid is no-op
2/ (Quickly) Allow to compile with slapos.

also build with our own ncurses instead of system termcap library.

  All software releases which are consider unstable and not mantained were
 moved to "unstable" folder. This folder is aims to be the place for tests,
 experimentation, personal releases which are not updated or tested for long
 term support.

also explicitly use our own giflib and libtiff.

so that we don't need to differentiate software/erp5/software.cfg in erp5-component branch.

zc.buildout >= 1.6.0-dev-SlapOS-013 automatically rebuilds parts whose referring parts are modified.