Prevent Fido from running on non Windows platforms

* Per #58, we consider that letting non-Windows users run Fido is going to become
  too much of liability moving forward, so the script now detects non Windows
  platforms and actively prevent itself from running there.
* Closes #60.
* Also some whitespace cleanup.

.editorconfig

@@ -5,5 +5,5 @@ root = true
 # Must use a BOM else Unicode strings will not display
 charset = utf-8-bom
 insert_final_newline = true
-indent_style = space
+indent_style = tab
 trim_trailing_whitespace = true