add a helper trait that extends Table for more convenient value retrieval

src/helpers/config.rs

@@ -0,0 +1,11 @@
+use toml::value::Table;
+
+pub trait Config {
+    fn get_string (&self, key: &str) -> Option<&str>;
+}
+
+impl Config for Table {
+    fn get_string (&self, key: &str) -> Option<&str> {
+        self.get(key).and_then(|value| value.as_str())
+    }
+}

src/helpers/mod.rs

@@ -1 +1,2 @@
 pub mod command;
+pub mod config;