Additional check for wireless

[clburlison]

If wireless is disabled and preference is to leave it disabled we should write that to status and exit(1).

Tied to #3

[clburlison]

This code should be ready to be applied.

import objc
import subprocess
from Foundation import NSBundle
objc.loadBundle('CoreWLAN',
                 bundle_path='/System/Library/Frameworks/CoreWLAN.framework',
                 module_globals=globals())
iface_name = CWInterface.interfaceNames()

# This handles a case where we have no wireless interface
# and the return value is None
if iface_name:
    # The first interface can be assumed to be the airport card
    iface_name = iface_name.itervalues().next()
    command = ['/usr/sbin/networksetup', '-getairportpower', 
              iface_name]
    proc = subprocess.Popen(command, shell=False,stdout=subprocess.PIPE)
    interface_output = (proc.communicate()[0].replace('\n', '')
                       .split(":")[1].replace(' ', ''))
    print interface_output
else:
    print None

[clburlison]

This was fixed resolved with 41da466