Profile 259 support beginnings

Added a new branch to start process of getting profile 259 support.  I basically took the latest version of sqlite-net and made similar changes to how Stuart got this working the first time.  As a side effect we might have async support now but I haven't tested anything yet.  Wanted to push this out because I'm not sure what to do with the Windows Phone project and wanted others to verify this is going down the right path.