added emoji command that returns the url of the emoji

commands/emoji.js

@@ -0,0 +1,24 @@
+module.exports = {
+	name: 'e',
+	description: 'Returns emoji url',
+	execute(message, args) {
+        let emoji = args.join(` `);
+
+        if (!emoji) {
+          message.channel.send("no emoji");
+          return;
+        }
+        var extension = ".png";
+        if (args[0].charAt(1) == "a") {
+          extension = ".gif";
+        }
+    
+        var num = emoji.split(":")[2];
+        try {
+          num = num.slice(0, -1);
+        } catch (e) {
+          message.channel.send("There was an error.");
+        }
+        message.channel.send("https://cdn.discordapp.com/emojis/" + num + extension);
+	}
+};