http rewrite (actually works this time!!1!) (#1257)

* rewrite http

* browser fun

* all the mimes dammit

* i need a newline

* whoops

* forgot about this

* use promises and HTTPRequest.method

* fluent

* move httpclient to external module

* branding

* middleware

* revert middleware

src/util/Util.js

@@ -1,4 +1,4 @@
-const superagent = require('superagent');
+const snekfetch = require('snekfetch');
 const Constants = require('./Constants');
 
 /**
@@ -54,7 +54,7 @@ class Util {
   static fetchRecommendedShards(token, guildsPerShard = 1000) {
     return new Promise((resolve, reject) => {
       if (!token) throw new Error('A token must be provided.');
-      superagent.get(Constants.Endpoints.gateway.bot)
+      snekfetch.get(Constants.Endpoints.gateway.bot)
         .set('Authorization', `Bot ${token.replace(/^Bot\s*/i, '')}`)
         .end((err, res) => {
           if (err) reject(err);