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/proposal/_proposal_form.html.haml

@@ -18,7 +18,7 @@
       Event type: #{@event.event_type.title}
       %br
       %br
-    = f.input :difficulty_level, :as => :select, :collection => @conference.difficulty_levels, :include_blank => "(Please select)" if @conference.use_difficulty_levels
+    = f.input :difficulty_level, :as => :select, :collection => @conference.difficulty_levels, :include_blank => "(Please select)" if @conference.difficulty_levels.any?
     = f.input :require_registration
     = f.input :abstract, :input_html => {:rows => 5, :class => "span11"},
       :required => true, :label => "Session Abstract"
@@ -47,4 +47,4 @@
           %span#biography-count #{current_user.biography_word_count}
           words.  Biographies are limited to 150 words.
   %p.text-right
-    = f.action :submit, :as => :button, :button_html => {:class => "btn btn-success"}
+    = f.action :submit, :as => :button, :button_html => {:class => "btn btn-success"}

app/views/proposal/new.html.haml

@@ -1,7 +1,28 @@
 .container
   .row
     .col-md-12
-      = simple_format(@conference.call_for_papers.description)
+      %p
+        - if @conference.event_types.any?
+          You can submit proposals for
+          = "#{event_types(@conference)}."
+        - if @conference.tracks.any?
+          Proposals should fit in one of the
+          = "#{pluralize(@conference.tracks.count, 'track')}:"
+          = "#{tracks(@conference)}."
+        The submission period has begun
+        %em
+          = @conference.call_for_paper.start_date.strftime('%A, %B %-d. %Y')
+        and closes
+        %em
+          = @conference.call_for_paper.end_date.strftime('%A, %B %-d. %Y.')
+        That means you have only
+        - days = (@conference.call_for_paper.end_date - Date.today).to_i
+        %b
+          = pluralize(days, 'days')
+          left!
+        Remember
+        = @conference.short_title
+        will only be as good as the sessions you present. Submit early, submit often!
   .row
     .col-md-12
       = render 'proposal_form'