Fix test for gift libraries
replaces setting layout in callback by block
for #1200 - voucher processing basics working

fix small kinks (emails still incomplete)

finish #1200 - implement vouchers

fix test suite for #1200
HOTFIX: Adds link to books box
Implements gifts billboard and cleans up billboards CSS
Merge pull request #1219 from fairmondo/feature-1217-billboard-gift

Refs #1217, implements gifts billboard and cleans up billboards CSS
for #1200 - brakeman is still mad, but this solution seems better
Merge pull request #1218 from fairmondo/feature-voucher

refs #1200 - implement vouchers
Merge branch 'master' into develop
repair paypal button