incorporate prawn gem/create basic pdf layout
slight modifications
merge master branch
use prawn-rails/create pdf view
merge add_exhibits_to_exhibitiion branch
sligth modifications
delete exhibittion_pdf/exhibition_pdf_spec files
merge branch "77_add_exhibits_to_exhibition"
add seeds
fix failing test
Merge pull request #13 from SoftServeUniversity/78_printable_info_cards_about_exhibits_in_exhibition

78 printable info cards about exhibits in exhibition