Bug Fix

* All: Fixed #14: `Environment.GetFolderPath(SpecialFolder)` can't call indirectly. => This is infrastructure's bug. For more details, please see [Swathe's commit logs](https://github.com/urasandesu/Swathe/commits/master).
* Framework: `IndirectionInfo.Equals` was implemented wrongly. It spawned StackOverflowException inevitably.