Added a check for CVE-2013-2119
Fixed mitigation message
* In BasicCheck::is_vulnerable_version? Added support for the fourth
  version number. We needed this to implement check for CVE-2013-7086
* Added a check for CVE-2013-7086
* Added a check for CVE-2013-6459
* Added a check for CVE-2013-5647
* Added a check for CVE-2013-0263
* Added a check for CVE-2013-0256