Slash fix, was a broken link (#13)

Author: chmac

README.md

@@ -6,7 +6,7 @@ Collects to-do items in MarkDown files to an Explorer tree view with contextual
 
 ![Screenshot](screenshot.gif)
 
-See the [feature rundown](demo\README.md).
+See the [feature rundown](demo/README.md).
 
 ## Running