Populate entity fields.

src/types/object.rs

@@ -168,6 +168,12 @@ pub struct OrgMacro<'s> {
 pub struct Entity<'s> {
     pub source: &'s str,
     pub name: &'s str,
+    pub latex_math_mode: bool,
+    pub latex: &'s str,
+    pub html: &'s str,
+    pub ascii: &'s str,
+    // Skipping latin1 because it is detrimental to the future. If anyone out there is using latin1, take a long look in the mirror and change your ways.
+    pub utf8: &'s str,
 }
 
 #[derive(Debug, PartialEq)]