add support for rhel7
Merge pull request #672 from chjohnst/master

add support for rhel7
Add support for importing rhel4AS

Support importing Red Hat Enterprise Linux 4 AS.
This patch wasn't never submitted after closing the issue #387
https://github.com/cobbler/cobbler/issues/387
Merge pull request #673 from angystardust/patch-1

Add support for importing rhel4AS
Added fedora20 to distro_signatures.json file
cli.py:  more meaningful messages on server exceptions

Make it clear that the exception originates server-side, and don't
trim the string, which may not be enclosed in quotes
utils.py:  fix set_virt_type() when value is <<inherit>>
koan/app.py:  get .ks file from --server host, not profile data

The profile's 'server' attribute address may not be addressable by the
VM host for retrieving the kickstart file to obtain install tree
information.

Instead, retrieve the kickstart file from the cobbler server specified
in the '--server' argument.
koan/app.py:  handle kickstart url '--proxy' argument

'--proxy' is a valid argument for the 'url' and 'repo' kickstart
options:

  url --url http://repos.example.com/repo --proxy=proxy.example.com:3128
koan/utils.py:  fix subprocess_get_response() to work with python 2.6

subprocess.check_output() was introduced in python 2.7, but EL6 is on
python 2.6.

Use the basic Popen() instead.
setup.py:  fix man page install source glob
utils.py:  add option default to add_options_from_fields() choices

If the default option is not in the option list, add it.

Most notably, this adds '<<inherit>>' as a choice to many options with
a fixed list of choices.
cobbler.spec:  install logrotate config
Add source /etc/sysconfig/cobblerd to init script
setup.py:  handle exception when 'apache' user doesn't exist

Building RPMs in a mock chroot environment, the 'apache' user doesn't
exist if the package has no Requires: httpd.

Handle the exception by catching and logging it.
Merge pull request #677 from lflaks/cobbler-f20

Added fedora20 to distro_signatures.json file
Merge pull request #678 from zultron/master-bugfixes

Master bugfixes