export feature for tracks and booths are done

app/views/admin/booths/_all_booths.pdf.prawn

@@ -0,0 +1,26 @@
+prawn_document(force_download: true, filename: "#{@file_name}.pdf", page_layout: :landscape) do |pdf|
+  booths_array = []
+  header_array = ['Booth ID',
+                  'Title',
+                  'Description',
+                  'Reasoning',
+                  'Submitter Name',
+                  'Submitter Relationship',
+                  'Website Url',
+                  'State']
+  booths_array << header_array
+  @booths.each do |booth|
+    row = []
+    row << booth.id
+    row << booth.title
+    row << booth.description
+    row << booth.reasoning
+    row << booth.submitter.name
+    row << booth.submitter_relationship
+    row << booth.website_url
+    row << booth.state
+    booths_array << row
+  end
+  pdf.text "#{@conference.short_title} booths", font_size: 25, align: :center
+  pdf.table booths_array, header: true, cell_style: {size: 8, border_width: 1},column_widths: [45,70,153,152,70,80,105,45]
+end