replace UberGallery with Minigal Nano
Work on #18; Remove old webapps install scripts. Name scripts according to app's directory name in wwwroot. Leave only postinstall stuff in the scripts, copy mechanism will be handled by a common function.
functions: _NzSetWwwPermissions now sets permissions for the whole apache documentroot. Delete webapps_functions as it is now empty
nodezero.conf: fix header. Not a shell script