create-image.sh: disk image generation now supports grub1 based distribution

Add grub1 support when generating virtual disk image. However we use extlinux
as installing grub1 in a chroot is not very reliable.

During the virtual disk image creation the bootloader installation process
detect whether grub2 is available or not, if not extlinux is used.
create-image.sh: basic network config for redhat based linux

When generating virtual disk image for redhat based linux, the automatic
network configuration settings is now properly handled. ndp is also
functionnal.
remote-install.sh: first version
build/common: report an error when the archive or the image fail
base.install: workaround CentOS rpmdb init
build: fix do_chroot to allow spaces in args
Makefile: build the deploy role by default
deploy.install: reuse ansible playbooks to install edeploy and pxemngr. do not install development packages
jenkins-build.sh: build the deploy role under Debian and Ubuntu
Merge branch 'add_rst_doc' of https://github.com/Spredzy/edeploy
Merge branch 'master' of github.com:enovance/edeploy

Re-sync with upstream, solve simple minor conflict:
	build/create-image.sh
server/matcher.py: added backtracking support in match_all
Merge branch 'master' of github.com:moxxxom/edeploy into moxxxom-master

By Pierre Rognant
* 'master' of github.com:moxxxom/edeploy:
  create-image.sh: basic network config for redhat based linux
  create-image.sh: disk image generation now supports grub1 based distribution
packages: restore chkconfig.save

install_packages_disabled() now properly restore chkconfig from
the backup
remove_system_on_rhn: minor cleanup
remove_system_on_rhn: remove the duplicated record

remove every RHN record with the same hostname.
repository: fix remove_system_on_rhn path
repositories: avoid the dependency on server-sfs-6

rhel-x86_64-server-sfs-6 is an optional dependency. Let's enable
it only if needed.
repo: use $ORIG instead of $SDIR

SDIR default is /root/edploy and as to be overwritten manually
RHN: register the machine only once