Move XDG global variables into their own module.

hammond-downloader/src/downloader.rs

@@ -11,7 +11,7 @@ use std::path::Path;
 
 use errors::*;
 use hammond_data::{Episode, Podcast};
-use hammond_data::{DL_DIR, HAMMOND_CACHE};
+use hammond_data::xdg_::{DL_DIR, HAMMOND_CACHE};
 
 // TODO: Replace path that are of type &str with std::path.
 // TODO: Have a convention/document absolute/relative paths, if they should end with / or not.
@@ -192,7 +192,6 @@ pub fn cache_image(pd: &Podcast) -> Option<String> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use hammond_data::{DL_DIR, HAMMOND_CACHE};
     use hammond_data::Source;
 
     use std::fs;