Implemented the renderer logic.

I should just need to implement ContextElement at this point.

src/parser/parser.rs

@@ -115,7 +115,7 @@ pub struct ParameterizedBlock<'a> {
 #[derive(Clone, Debug, PartialEq)]
 pub struct Partial<'a> {
     pub name: String,
-    params: Vec<KVPair<'a>>,
+    pub params: Vec<KVPair<'a>>,
 }
 
 #[derive(Clone, Debug, PartialEq)]