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NSC have refactored and split the nsc-puppet-utils module into
multiple modules.  The parts of nsc-puppet-utils we were using are
now in the "cfgfile" module.  Update README with this information.

This adds the defintion bootloader::grub0::option, which can set and
unset options in the Grub 0.x config file.  It handles both "bare"
options (e.g. 'hiddenmenu') and valued options (e.g. timeout=5).

Managing Grub 2 options seems a bit more complicated, so for now we
only implement the Grub 0.x version.

Add a parameter 'provider' to the kernel_option definition, allowing
users to specify which bootloader is in use.

This adds support in bootload::grub0::kernel_option for setting
kernel commandline options, both "bare" options, and options with
values.  It uses Augeas with the Grub lens to handle this.

Augeas knows the grammar for the Grub0 config file, so we don't need
to have complicated regular expressions in our code to deal with all
the corner cases.

On UEFI systems, grub.cfg is in /boot/efi/EFI/<os>/grub.cfg instead
of in /boot/grub2/grub.cfg.  Luckily, instead of having to know what
"<os>" needs to be instantiated with (e.g. "centos"), it seems that
we can just point grub2-mkconfig to the symlink /etc/grub2-efi.cfg.
(This at least works on RedHat:ish systems.)

This adds a new helper for bootloader::kernel_option handling the
Grub 2 case.  This also only supports removing options, though, not
setting them.

Grub 2 builds its config file (/boot/grub2/grub.cfg) from templates
in /etc/grub.d, and settings in /etc/default/grub, and it needs to
be regenerated every time you change those templates or settings (or
when you install a new kernel, et.c).  This adds a class for doing
so, bootloader::grub2::rebuild_grub_cfg.

This adds a definition bootloader::kernel_option for managing kernel
command line options.  The implementation is currently rudimentary,
and only support removing options when Grub 0.x is used; Grub 2.x or
setting options is not yet implemented.

This is intended as an internal helper for other definitions or
classes.

This will contain a Puppet module for managing bootloader (e.g. Grub)
settings for Linux systems.