Rearrange the types modules a bunch

src/types/value.rs

@@ -0,0 +1,24 @@
+/* types/value.rs
+ * Eryn Wells <eryn@erynwells.me>
+ */
+
+use std::fmt::Debug;
+use std::any::Any;
+
+pub trait Value: Debug + ValueEq {
+    fn as_value(&self) -> &Value;
+}
+
+/// A trait on value types that makes it easier to compare values of disparate types. The methods
+/// provided by this trait are used by the PartialEq implementation on Values.
+pub trait ValueEq {
+    fn eq(&self, other: &Value) -> bool;
+    fn as_any(&self) -> &Any;
+}
+
+impl<'lhs,'rhs> PartialEq<Value+'rhs> for Value+'lhs {
+    fn eq(&self, other: &(Value+'rhs)) -> bool {
+        ValueEq::eq(self, other)
+    }
+}
+