Fixed a link, per DOCUMENT-198 in JIRA

Link to the MSDN page about 'COMMON_APPDATA' updated from...

http://msdn.microsoft.com/en-us/library/windows/desktop/bb762494/(v=vs.85/).aspx

...to...

http://msdn.microsoft.com/en-us/library/aa367992(v=vs.85).aspx
Merge pull request #418 from psoloway/patch-2

Fixed a link, per DOCUMENT-198 in JIRA