makes models and schema modules privates, adds re-exports

planner/src/bin/weekly.rs

@@ -4,7 +4,7 @@ extern crate cookbook;
 extern crate planner;
 
 use self::cookbook::*;
-use self::cookbook::models::Recipe;
+use self::cookbook::recipes::Recipe;
 use self::planner::solver::{Variables, Domain, Problem};
 
 /// We want a mapping of the week meals (matin, midi, soir)