Enable SELinux and use plaintext root password

- Added note about using SHA512crypt

Signed-off-by: Frederick Ding <frederick@frederickding.com>
Disable rescue environment

- Not particularly useful for Xen VMs
Added most of @standard packages

- Even though these servers are minimal, we still need
  many of these programs like rsync, tar, zip, wget, logrotate
- For a listing of packages, run `yum groupinfo standard`
Change legacy `menu.lst` location

- Make a `/boot/grub/grub.conf` and symlink to that
- Might be better when system updates, or so says
  http://wiki.xen.org/wiki/PvGrub#Install_a_stub_grub.conf_in_the_guest_so_that_the_grub_update_scripts_won.E2.80.99t_fail
  (we're not using pv-grub but the same concept applies)
Add commented header identifying develop-branch
Prepare for `feature/grub2` branch
Remove fake `menu.lst` method and change grub2 config instead

- Changes `/etc/default/grub`, `/etc/grub.d/00_header`,
  `/boot/grub2/grub.cfg`
- Untested!
Fix SELinux 'enforcing' line

- Bug introduced in e8d713e2e2dcc9eebc06009054141bd0d4f4ecca
Merge branch 'origin/develop'
Merge branch 'feature/grub2'

- GRUB2 support now ready for develop
Release 0.1
Version 0.1 -- with GRUB2 support

Signed-off-by: Frederick Ding <frederick@frederickding.com>