Double to single quotes.
Make `salt.payload.SREQ` IPv6 aware.

Since `salt.payload.SREQ` also checks for the `IPV4ONLY` attribute, which was added because of the IPv6 support, and that has proven problematic in some networks, we only set `IPV4ONLY` if IPv6 support is enabled.
Created file for lvm state. Implmenetd vg related functions
Added functions to create/remove logical volumes ref #118
Added function for creating pysical volumes. ref #118
Added comments to functions. ref #118
Fixed calls to lvdisplay salt command.
Added module comment block
Caught error cases in display commands for lvm module.
Use kwarg for lvm absent
Added docs for lvm state
Added docs for lvm state
Update iptables.py

Spaces were not handled correctly when parsing arguments, both flags and log prefix can contain spaces.
Added the 'master' grain to give the minion it's master
fix bad & tab indentation reported by pylint
Fixed a grammar issue in the comments
add whitespace around operators based on pylint report
improve pillar.cobbler.ext_pillar()

avoid mutable default argument value
approximate a dict comprehension
add missing .format() in modules.img.mnt_image
fix typo in states.img.umount_image: 'fomat' -> 'format'