Release v0.1.3 prealpha(fix some bugs on parsing)
Bug fix
* Fix bug on Core.cs
* Remove Binary Folder and move to SourceForge
Revert "Release v0.1.3 prealpha(fix some bugs on parsing)"

This reverts commit 94423d6b402b2b91bfd9f1380ecea3912a753988.
Merge branch 'master' of https://github.com/lambdalice/CoreTweet
Add ExtensionAttribute (for .NET 4.5)
Fix mistype in User.cs
Fix mistype in User.cs