Code cleanup

-Replace tabs with double-spaces
-Betting spacing and lining up of code functions
-Add missing semi-colons
-Remove extra characters and spaces where applicable
-Remove commented-out code fragments
-Add missing 2021 date to LICENSE
-Small touchups and other misc nitpickings

models/richlist.js

@@ -1,5 +1,5 @@
-var mongoose = require('mongoose')
-  , Schema = mongoose.Schema;
+var mongoose = require('mongoose'),
+    Schema = mongoose.Schema;
 
 var RichlistSchema = new Schema({
   coin: { type: String },