export feature for tracks and booths are done

app/views/admin/tracks/_confirmed_tracks.pdf.prawn

@@ -0,0 +1,28 @@
+prawn_document(force_download: true, filename: "#{@file_name}.pdf", page_layout: :landscape) do |pdf|
+  tracks_array = []
+  header_array = ['Track ID',
+                  'Name',
+                  'Description',
+                  'Room',
+                  'Start Date',
+                  'End Date',
+                  'Submitter Name',
+                  'Included in Cfp',
+                  'State']
+  tracks_array << header_array
+  @tracks.confirmed.each do |track|
+    row = []
+    row << track.id
+    row << track.name.to_s
+    row << track.description.to_s
+    row << track.try(:room).try(:name)
+    row << track.start_date.to_s
+    row << track.end_date.to_s
+    row << track.try(:submitter).try(:name)
+    row << (track.cfp_active? ? 'Yes' : 'No')
+    row << track.state
+    tracks_array << row
+  end
+  pdf.text "#{@conference.short_title} tracks", font_size: 25, align: :center
+  pdf.table tracks_array, header: true, cell_style: {size: 8, border_width: 1},column_widths: [40,70,230,65,55,55,90,65,50]
+end