FlexWiki security groundwork complete

I checked in the FlexWiki security framework last night.  This completes the initial tasks of getting a plugable architecture for storing the user and permission information.  The only Data Provider that is available right now is a SimpleDataProvider.  This data provider is designed to be simple to deploy but is limited in it's performance capabilities.  Check out the FlexWikiSecurityProject for more details.  Next up I have to start plugging the security into the FlexWiki web.