add booth in alias

Booth can be replaced with any alias by replacing it in alias.en.yml.

app/views/booths/_form.html.haml

@@ -17,9 +17,9 @@
 
         %p.text-right
           - if @booth.new_record?
-            = f.submit 'Create Booth Request', class: 'btn btn-success'
+            = f.submit "Create #{(t'booth').capitalize } Request", class: 'btn btn-success'
           - else
-            = f.submit 'Update Booth Request', class: 'btn btn-success'
+            = f.submit "Update #{(t'booth').capitalize } Request", class: 'btn btn-success'
 
   :javascript
     $(document).ready(function() {

app/views/booths/index.html.haml

@@ -2,7 +2,7 @@
   .row
     .col-md-12.page-header
       %h1
-        Your booth requests for
+        Your #{t'booth'} requests for
         = @conference.title
   .row
     .col-md-12
@@ -48,4 +48,4 @@
                     restart_conference_booth_path(@conference.short_title, booth),
                     method: :patch, class: 'btn btn-mini btn-success', id: "restart_booth_#{booth.id}"
       .pull-right
-        = link_to 'Add Booth', new_conference_booth_path(@conference.short_title), class: 'button btn btn-primary'
+        = link_to "Add #{(t'booth').capitalize }", new_conference_booth_path(@conference.short_title), class: 'button btn btn-primary'

app/views/booths/new.html.haml

@@ -1,4 +1,4 @@
 .container
-  %h1 Request a booth
+  %h1 Request a #{t'booth'}
 
   = render 'form'