Adjust animations, fix bugs, and tweak a few algos

* Adjust page change animations to slide the page closed and then
  open again.
* Add Railcraft to the standard set of mods
* Change every controller which uses an `ImageLoader` to only accept
  it from a parent controller (with the router creating the one
  shared instance).
* Fix several places where controllers need to refresh when the mod
  pack changes
* Fix a few places which should be using the `ImageLoader` but were
  not.
* Remove a number of animations which caused performance issues (esp.
  animating individual items in item group views).
* Fix a bug where changing the current version of a mod didn't cause
  the current crafting plan to be re-evaluated
* Simplify the name finder to allow regular expressions instead of
  the current algorithm

src/css/templates/item_page.scss

@@ -6,6 +6,8 @@ All rights reserved.
 */
 
 .view__item_page {
+    display: none;
+
     & > div {
         vertical-align: top;
         display: inline-block;

src/css/templates/mod_page.scss

@@ -6,6 +6,8 @@ All rights reserved.
 */
 
 .view__mod_page {
+    display: none;
+
     & > div {
         vertical-align: top;
         display: inline-block;