Implement consistent admin interface

* Consistent route/model/controller/view layout
* Get rid of unused photos, speakers, dietchoices, social_events controllers
* Drop unused :public from Rooms and :description from CallForPapers

app/views/admin/tracks/_form.html.haml

@@ -0,0 +1,15 @@
+.row
+  .col-md-12
+    .page-header
+      %h1
+        -if @track.new_record?
+          New
+        = @track.name
+        Track
+.row
+  .col-md-12
+    = semantic_form_for(@track, :url => (@track.new_record? ? admin_conference_tracks_path : admin_conference_track_path(@conference.short_title, @track))) do |f|
+      = f.input :name
+      = f.input :color, :input_html => {:size => 6, :type => "color"}, :required=> true
+      = f.input :description, :input_html => {:rows => 2, data: { provide: "markdown-editable" } }, hint: markdown_hint
+      = f.action :submit, as: :button, button_html: { class: 'btn btn-primary' }

app/views/admin/tracks/_track_fields.html.erb

@@ -1,9 +0,0 @@
-<div class="nested-fields">
-    <%= f.inputs do %>
-        <%= f.input :name %>
-        <%= f.input :color, :input_html => {:size => 6, :type => "color"}, :required=> true %>
-        <%= f.input :description, :input_html => {:rows => 2, data: { provide: "markdown-editable" } }, hint: markdown_hint %>
-        <%= remove_association_link :track, f %>
-    <% end %>
-</div>
-

app/views/admin/tracks/index.html.haml

@@ -1,5 +1,36 @@
 .row
-  .col-md-8
-    = semantic_form_for(@conference, :url => admin_conference_track_path(@conference.short_title, @conference.tracks)) do |f|
-      = dynamic_association :tracks, "Tracks", f
-      = f.action :submit, :as => :button, :button_html => {:class => "btn btn-primary"}
+  .col-md-12
+    .page-header
+      %h1 Tracks
+      %p.text-muted
+        Categorize events in your conference
+.row
+  .col-md-12
+    %table.table.table-hover#tracks
+      %thead
+        %th Name
+        %th Description
+        %th Color
+        %th Actions
+      %tbody
+        - @conference.tracks.each do |track|
+          %tr
+            %td
+              = link_to(admin_conference_track_path(@conference.short_title, track)) do
+                = track.name
+            %td
+              %p
+                = truncate(track.description)
+            %td
+              %span.label{style: "background-color: #{track.color};"}
+                = track.color
+            %td
+              .btn-group{role: "group"}
+                = link_to 'Edit', edit_admin_conference_track_path(@conference.short_title, track.id),
+                method: :get, class: 'btn btn-primary'
+                = link_to 'Delete', admin_conference_track_path(@conference.short_title, track.id),
+                method: :delete, class: 'btn btn-danger', data: { confirm: "Do you really want to delete #{track.name}?" }
+.row
+  .col-md-12.text-right
+    = link_to 'New Track', new_admin_conference_track_path(@conference.short_title), class: 'btn btn-success'
+

app/views/admin/tracks/show.html.haml

@@ -0,0 +1,31 @@
+.row
+  .col-md-12
+    .page-header
+      %h1
+        = @track.name
+        Track
+      %p.text-muted
+        Events in this track
+.row
+  .col-md-12
+    %table.table.table-hover.datatable
+      %thead
+        %th Title
+        %th Type
+        %th Submitter
+        %th State
+        %th Time
+      %tbody
+        - @track.events.each_with_index do |event|
+          %tr
+            %td
+              =link_to event.title, admin_conference_event_path(@conference.short_title, event)
+            %td
+              = event.event_type.title
+            %td
+              =link_to event.submitter.name, admin_user_path(event.submitter)
+            %td
+              = event.state
+            %td
+              = event.start_time
+