[#4] Added from_config_file constructor to Tavern.

tavern/src/tavern.rs

@@ -25,3 +25,20 @@ pub struct Tavern
    /// A list of all adventurers (authors) who have contributed tales.
    pub authors: Vec<Adventurer>
 }
+
+
+
+impl Tavern
+{
+   #[cfg(feature = "publisher")]
+   pub fn from_config_file<P>(config_file: P) -> Self
+      where P: AsRef<std::path::Path>
+   {
+      // Read the previously written TOML file
+      let toml_data =
+      std::fs::read_to_string(&config_file).expect("Failed to read TOML file");
+
+      // Deserialize it
+      toml::from_str(&toml_data).expect("Failed to parse TOML")
+   }
+}