Convert site to a single JavaScript archive

* Convert build to use a single JavaScript file on the site (instead
  of downloading each library separately). This also means that all
  global variables (e.g., `$` for JQuery, `_` for Underscore.js) can
  be removed.
* Remove unused scripts and/or move them to a more appropriate repo
* Update the `deploy` script to work with CircleCI's automation
* Update markdown display code to allow images to be located with the
  markdown data files instead of the pre-rendered index pages

src/coffee/models/mod_version.coffee

@@ -6,10 +6,11 @@ All rights reserved.
 ###
 
 BaseModel      = require './base_model'
-{Event}        = require '../constants'
 Item           = require './item'
 ItemSlug       = require './item_slug'
 Recipe         = require './recipe'
+_              = require 'underscore'
+{Event}        = require '../constants'
 {RequiredMods} = require '../constants'
 {Url}          = require '../constants'