Add Content-Type urlencoded HTTP Header to fix Windows 8 UpdateStatus 401 error
Fixed issue with multi-byte characters in callback URLs.
Merge branch 'master' of https://git01.codeplex.com/forks/timurgilfanov/linqtotwitterwin8updatestatusfix into Timurgilfanov/LinqToTwitterWin8UpdateStatusFix
Moved PCL projects into their own solution.