Update URL scheme to include /item/*

* Update the router to understand /item/:name routes in addition to
  v1.0-style parameterized routes
* Add support for updating the current URL based upon the item being
  viewed
* Change LandingPage* to ItemPage*

src/scripts/url_params.coffee

@@ -0,0 +1,52 @@
+###
+# Crafting Guide - url_params.coffee
+#
+# Copyright (c) 2014 by Redwood Labs
+# All rights reserved.
+###
+
+url = require 'url'
+
+########################################################################################################################
+
+module.exports = class UrlParams
+
+    constructor: (parseMap, url=null)->
+        if not parseMap? then throw new Error 'parseMap is required'
+        url ?= window.location.href
+
+        @_parseMap = {}
+        for name, options of parseMap
+            options.type ?= 'string'
+            options.default ?= null
+
+            options.parse = this["_#{options.type}"]
+            if not options.parse? then throw new Error "#{options.type} is not a valid type"
+
+            @_parseMap[name] = options
+
+        @parse url
+
+    parse: (urlText)->
+        params = url.parse(urlText, true).query
+        for name, options of @_parseMap
+            value = params[name]
+            if value?
+                this[name] = options.parse value
+            else
+                this[name] = options.default
+
+    # Private Methods ##############################################################################
+
+    _boolean: (text)->
+        return true if text in ['true', 'yes']
+        return false
+
+    _integer: (text)->
+        return null unless text?
+        result = parseInt text
+        return null unless _.isNumber result
+        return result
+
+    _string: (text)->
+        return text