Add events and refactor

Add event listener with JSON output (WIP)
Add notifier on movement events
Refactor Parameter and ParameterList (still shit)

src/utils.rs

@@ -1,5 +1,5 @@
 use crate::models::Client;
-use crate::parameter::Parameter;
+use crate::parameter::parameters_to_string;
 
 pub fn decode_value(value: &str) -> String {
     value
@@ -32,9 +32,9 @@ impl From<SendTextMessageTarget> for String {
             _ => String::from("0"),
         };
 
-        Parameter::list_to_string(vec![
-            Parameter::new("targetmode", target_mode),
-            Parameter::new("target", &target)
-        ])
+        parameters_to_string(vec![
+            (String::from("targetmode"), String::from(target_mode)),
+            (String::from("target"), target)
+        ], " ")
     }
 }