Update RestSharp from SL4 to SL5, WP7.1 to WP8, and Net3.5 to Net4.5.1
Convert solution from vs2012 to vs2013
Add WinRT project to solution
1.Remove most OAuth.
2.Remove all System.Security.Cryptography.
3.Add HttpUtility of WinRT
1. rollback System.Security.Cryptography
2. delete HttpUtility of WinRT
Block System.Security.Cryptography with WinRT
1. Remove culture of ToLower method.
2. Remove duplicate assembly setting.
1. Replace file of WinRT with NotImplementedException.
2. Transport part of reflection to portable.
fix bug
Process reflection difference between WinRT and other platform, throw NotImplementedException now.
Add NETFX_CORE
Change close to dispose
Just compile success for WinRT