Support for serial text consoles

this PR is for following:
issue/528

to have it enabled, you need smth like:
```
parameters:
  linux:
    system:
      console:
        ttyS0:
          autologin: root
          rate: 115200
          term: xterm
```

See merge request !10

Linux sysctl kernel parameters

sysctl kernel

See merge request !13

fix swap file check

add swap partition support

NetworkManager

support for option to disable NetworkManager service.

(on some _servers_ you need to do it for some kinds of configuration)

tested on Ubuntu & Centos

See merge request !12

RedHat network support: set default proto: according OS default

'protocol' part of network configuration is different in Debian vs RedHat.

current value 'static' isn't compatible with RedHat OSes see: http://pydoc.net/Python/salt/2014.7.0/salt.modules.rh_ip/ - 'none' should be set instead

See merge request !11

This reverts commit bedfa10ae6.

VLAN networking support

this should add VLAN networking setup.
from DOCs..
```
bond0.10:
  network.managed:
    - type: vlan
    - ipaddr: 10.1.0.4
    - use:
      - network: bond0
    - require:
      - network: bond0
```

See merge request !9