Add CVE-2014-4971 BthPan local privilege escalation

Add CVE-2014-4971 BthPan local privilege escalation for Windows XP SP3
Update code to reflect @OJ code suggestions
Merge in changes from @todb-r7.
Refactor for Credentials gem
Corrected 3 issues identified by jlee-r7
Fix to self.refname
Initial commit of SBG6580 scanner after cleanup
Corrected OIDs to all numeric
Fixed syntax issue
Simplified get_radius_info method and cleaned up comments
Modified logic to attempt to process WiFi key data even if primary Wifi interface is not up
Corrected extraction of WEP keys, current key, RADIUS server and port
Cleanup per msftidy report of Spaces at EOL
Added disclosure URL and cleaned up output fields
Modified to pull username and password first
Changed default value for SNMP Version option
Changes to error output per PR comments
Variable name changes per ruby style guide
Added WiFi ifindex discovery and enhanced error handling
initial test