begin fleshing out discord module. Implement sender/channel as struct for now, there might be a performance hit from copying so much data around but we can look at optimization later

src/event/mod.rs

@@ -1,8 +1,8 @@
 use {Channel, User};
 
 #[derive(Debug, Clone)]
-pub enum Event<'a> {
-    Message { sender: &'a User, channel: Option<&'a Channel>, content: String },
-    Join { channel: &'a Channel },
-    Quit { channel: &'a Channel }
+pub enum Event {
+    Message { sender: User, channel: Option<Channel>, content: String },
+    Join { channel: Channel },
+    Quit { channel: Channel }
 }