[archiso] Remove if-already-runned check in command_install()

As it has been done in build.sh
https://projects.archlinux.org/archiso.git/commit/?id=12286e271253f54fd851906f33cdd2b2c30d6a88
[archiso] Remove if-already-runned check in _chroot_init()

As it has been done in build.sh
https://projects.archlinux.org/archiso.git/commit/?id=4890ce0b67044bb5664b5124c1f3e3f8964ade89
[archiso] Display the progress bar if not in quiet mode during mksquashfs

That is as it should be, I think.
[archiso] New option -d can avoid the deletion of synced pacman db
[archiso] Remove workaround for nls/vfat

The proper fix in now in mkinitcpio-18

https://projects.archlinux.org/archiso.git/commit/?id=eea299fa19dd8dbe1d48e63814e1db86dd44df2a
[configs/releng] Fix /root mode
prepare release
[archiso] Update README

https://projects.archlinux.org/archiso.git/commit/?id=b14adf04fe63c4b5f09bc496ff9b1fdb804d9640
[configs/alter] initial modification

Initial modification of configs/alter, with a lot of new things:

* Dual-arch has been deprecated
* Extra EFI support has been deprecated
* Onboard PC-speaker has been disabled
* Toggle on numlock at startup
* Add some references and guides in /home/arch/ref
* Enable [multilib] for packages.* on x86_64
* Use ext2 for root-image
* New options for build.sh: -A, -q and -P
* Add some unoffical repositories to pacman.conf, they are commented by default: Usage is at your own risk
* udev/systemd 197 naming policies has been disabled

* Introduce a new file: packages.backport
  This may be useful if you want to add AUR packages to the Live environment, usage example:
   $ mkdir backport
   $ cp ~/etc/built/aur_pkg/*.pkg.tar.xz ./backport
   $ cd ./backport
   $ repo-add backport.db.tar.xz *.pkg.tar.xz
   $ cd ..
   # build.sh

* Add new packages:
  * xfce4 as a lightweight and high reusability desktop environment
  * gparted for partition management
  * cmus as a music player
  * debootstrap for installing debian
  * zfs-git for zfs support
  * v86d for uvesafb support
  * fbterm for CJF support on tty
  ... and other packages

* Remove these packages: b43-fwcutter,gnu-netcat,grml-zsh-config,gummiboot,prebootloader,refind-efi

* Add some useful scripts:
  * testcolor,256colors,256colors2.pl for color testing
  * prettyping for better ping output
[configs/releng] Add an empty machine-id

This makes systemd generate a machine-id on early boot and prevents it from thinking we need any "first boot" setup. We really don't want systemd thinking that, since we carefully prepared our root file system.

This also ensures every live environment has a unique machine id.

See: https://mailman.archlinux.org/pipermail/arch-releng/2014-September/003435.html
[configs/alter] Add an empty machine-id
prepare release
[configs/alter] install.txt: avoid redirection
[configs/alter] Toggle on numlock even in single user mode
[archiso] aitab: allow set mount options

New column in aitab, which is used for setting mount options for each filesystem.

Minor: also add a keep-ending-newline note in aitab
[configs/alter] Update README
[archiso] New boot parameter img_dev_mnt_opt

Which is used for setting the mount options of img_dev
[archiso] Disable ext4 resize_inode

Remove unused feature, just to save space

https://mailman.archlinux.org/pipermail/arch-releng/2014-August/003426.html
update README.md
[configs/alter] October update

* Set the default serial speed to 115200 bps, also add a new boot entry for this
* Restore the extra EFI support, except for the efiboot.img, which is used for "El Torito" EFI boot mode
* Use the emacs-friendly US keymap
* root-image: use ext4 instead of ext2
* New packages in packages.{backport,both}: pax, bmon, 6rdctl-git, autodkms, smp_utils, isz-tool and so on
* build.sh: add '--preserve=timestamps' to some cp command, in order to preserve the mtime
* Change the way to determine if enable NoCow(chattr +C) for btrfs pool
* Remove the empty fstab in root-image/etc
  ... and other minor fixup