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.
Add specs for Rex::Encoder::Alpha2::Generic
Refactor specs for Rex::Encoder::Alpha2::Generic
Include it_behaves_like
Fix shared examples
Use non aphanumeric badchar
Add specs for Rex::Encoder::Alpha2::AlphaUpper
Add specs for Rex::Encoder::Alpha2::AlphaMixed
Add specs for Rex::Encoder::Alpha2::UnicodeUpper
Add specs for Rex::Encoder::Alpha2::UnicodeMixed
Add specs for Rex::Oui
add exploit for CVE-2011-1485
typo
Fix @lsanchez-r7's feedback, single expectation per test and avoid explicit use of subject
Merge pull request #4 from rapid7/master

merge
Add exploit for Track-It! file upload vuln
Add OSVDB id and full disclosure URL
Sort specs

MSP-11466