Decrease timeout to 1 second.
Removed disclaimers.

Now only one menuitem (OK). User should select language at
lightdm-gtk-greeter.
Removed files containing disclaimer.
Updated menu configuration (converted from UTF-8).
Renamed stdmenu.cfg to appearance.cfg.
Removed obsolete comment.
Moved content configuration to single file.
Moved menu configuration to single file.
Removed obsolete comments.
Grouped configuration lines.
Removed obsolete instructions.
Removed obsolete instruction.
Fixed building specific commit.
Fixed hook: use Syslinux instead of Isolinux.
Fixed hook name.
Renamed hooks: all hooks include .hook. part before extension.
Merge branch 'remove-syslinux-menu'

* remove-syslinux-menu:
  Removed obsolete instruction.
  Removed obsolete instructions.
  Grouped configuration lines.
  Removed obsolete comments.
  Moved menu configuration to single file.
  Moved content configuration to single file.
  Removed obsolete comment.
  Renamed stdmenu.cfg to appearance.cfg.
  Updated menu configuration (converted from UTF-8).
  Removed files containing disclaimer.
  Removed disclaimers.
  Decrease timeout to 1 second.
Fixed: store script, not script output.
Fixed: store HOME as variable, not variable value.