Store configurations in the correct XDG App Dir
Created by: clippix
Read init file from the XDG App Dir using the app_dirs crate. The init file is now named initrc instead of .ionrc.
Fix Issue #326 (closed) I wasn't sure how to format some of these changes (like the author name or the struct declaration inside a function call), please feel free to modify it.
Moreover, it looks like some others things could be moved into the app dir (history file)?