Add nascent version of the mod detail page

* Create a nascent version of the mod detail page
* Make the slug mandatory for Mod instead of name, and load the name
  from the data file
* Make the Feedback view universal on all pages
* Refactor the use of mod pack to have a single global object at the
  router level which is shared between pages. Further, make this one
  object load itself immediately and have it automatically load any
  activated mod version
* Refactor the use of Storage related to mod pack versions into the
  router as well.
* Add trace logging back in for events, but allow individual classes
  to suppress it (as opposed to actually supressing the events)
* Fix a bug in ModVersion.eachItem where it would suggest so-called
  items which are merely registered slugs without associated items

src/scripts/models/mod.coffee

@@ -15,11 +15,11 @@ BaseModel      = require './base_model'
 module.exports = class Mod extends BaseModel
 
     constructor: (attributes={}, options={})->
-        if not attributes.name? then throw new Error 'attributes.name is required'
+        if not attributes.slug? then throw new Error 'attributes.slug is required'
         attributes.author      ?= ''
         attributes.description ?= ''
+        attributes.name        ?= ''
         attributes.primaryUrl  ?= null
-        attributes.slug        ?= _.slugify attributes.name
         super attributes, options
 
         @_activeModVersion = null