Beginning of the render_tag function.

Beginning of the render_tag function. At this point I need to figure out how to access elements in the context.

src/parser/mod.rs

@@ -7,5 +7,6 @@ pub use node_invoker::run_node_dust;
 pub use node_invoker::NodeError;
 pub use node_invoker::Result;
 pub use parser::template;
+pub use parser::DustTag;
 pub use parser::Template;
 pub use parser::TemplateElement;

src/parser/parser.rs

@@ -52,7 +52,7 @@ enum Special {
 }
 
 #[derive(Clone, Debug, PartialEq)]
-struct Comment<'a> {
+pub struct Comment<'a> {
     value: &'a str,
 }
 
@@ -62,7 +62,7 @@ struct Path<'a> {
 }
 
 #[derive(Clone, Debug, PartialEq)]
-struct Reference<'a> {
+pub struct Reference<'a> {
     path: Path<'a>,
     filters: Vec<Filter>,
 }