use jade class syntax

views/main/filters.jade

@@ -1,4 +1,4 @@
-.filters(ng-controller='FiltersCtrl', class='tag-list')
+.filters.tag-list(ng-controller='FiltersCtrl')
   .pull-left.filter-description
     | Tags:
   ul.nav.nav-pills

views/options/social/chat-box.jade

@@ -1,4 +1,4 @@
-form(ng-submit='postChat(group,message.content)', class='chat-form')
+form.chat-form(ng-submit='postChat(group,message.content)')
   .-options
     //FIXME ng-model makes this painfully slow! using jquery for now, which is really non-angular-like
     .control-group.option-large(ng-controller='AutocompleteCtrl')