progress(modules + hashmaps): finished modules and almost done hashmaps

exercises/10_modules/modules2.rs

@@ -5,6 +5,9 @@ mod delicious_snacks {
     // TODO: Add the following two `use` statements after fixing them.
     // use self::fruits::PEAR as ???;
     // use self::veggies::CUCUMBER as ???;
+    
+    pub use self::fruits::PEAR as fruit;
+    pub use self::veggies::CUCUMBER as veggie;
 
     mod fruits {
         pub const PEAR: &str = "Pear";