BlacklightAdvancedSearch was causing a eager load error in Rails 4

```
/Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in
`require': No such file to load -- advanced_controller (LoadError)
  from
  /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in
  `block in require'
    from
    /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in
    `load_dependency'
      from
      /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in
      `require'
        from
        /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:329:in
        `require_or_load'
          from
          /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:288:in
          `depend_on'
            from
            /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:206:in
            `require_dependency'
              from
              /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/engine.rb:465:in
              `block (2 levels) in eager_load!'
                from
                /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/engine.rb:464:in
                `each'
                  from
                  /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/engine.rb:464:in
                  `block in eager_load!'
                    from
                    /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/engine.rb:462:in
                    `each'
                      from
                      /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/engine.rb:462:in
                      `eager_load!'
                        from
                        /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/engine.rb:347:in
                        `eager_load!'
                          from
                          /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/finisher.rb:56:in
                          `each'
                            from
                            /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/finisher.rb:56:in
                            `block in <module:Finisher>'
                              from
                              /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in
                              `instance_exec'
                                from
                                /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in
                                `run'
                                  from
                                  /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:55:in
                                  `block in run_initializers'
                                    from
                                    /Users/justin/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:150:in
                                    `block in tsort_each'
                                      from
                                      /Users/justin/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:183:in
                                      `block (2 levels) in
                                      each_strongly_connected_component'
                                        from
                                        /Users/justin/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:219:in
                                        `each_strongly_connected_component_from'
                                          from
                                          /Users/justin/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:182:in
                                          `block in
                                          each_strongly_connected_component'
                                            from
                                            /Users/justin/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:180:in
                                            `each'
                                              from
                                              /Users/justin/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:180:in
                                              `each_strongly_connected_component'
                                                from
                                                /Users/justin/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:148:in
                                                `tsort_each'
                                                  from
                                                  /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:54:in
                                                  `run_initializers'
                                                    from
                                                    /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:215:in
                                                    `initialize!'
                                                      from
                                                      /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in
                                                      `method_missing'
                                                        from
                                                        /Users/justin/workspace/curate_dce/config/environment.rb:5:in
                                                        `<top
                                                        (required)>'
                                                          from
                                                          /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in
                                                          `require'
                                                            from
                                                            /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in
                                                            `block in
                                                            require'
                                                              from
                                                              /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in
                                                              `load_dependency'
                                                                from
                                                                /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in
                                                                `require'
                                                                  from
                                                                  /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:189:in
                                                                  `require_environment!'
                                                                    from
                                                                    /Users/justin/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands.rb:63:in
                                                                    `<top
                                                                    (required)>'
                                                                      from
                                                                      bin/rails:4:in
                                                                      `require'
                                                                        from
                                                                        bin/rails:4:in
                                                                        `<main>
```