host: minor doc style improvements

Fix for commented dmidecode output

host: added another example

This patch fixes the problem that on some system dmidecode prints out warning information as commented text. For example:

    [user@system ~]# dmidecode -s system-manufacturer
    # SMBIOS implementations newer than version 2.6 are not
    # fully supported by this version of dmidecode.
    HP

So we remove all commented lines from the output.

Also updated CHANGELOG for this feature

using AIX 'csum' command for generating MD5 checksums

Add option for DNS nameservers to quantum_subnet module

Added md5 as a jinja filter - returns hex digest of input

Allow for dynamic accelerate_port: and port: in plays

Make --check mode work with fireball and accelerate connections

Merge branch 'feature/file-state-touched' of https://github.com/resmo/ansible into resmo-feature/file-state-touched

fix documentation examples for with_nested

Supervisord can be installed at the user level or system level.
Installating as a user is particularly useful for systems without root access.

Adds the ability to provide a custom supervisorctl executable path, supporting custom installations