[backend] Translate boolean values in countries index.

[Closes #3601]
Bump trunk8 to v1.3.1

[Closes #3542]
Misc layout fixes for shipping and stock pages.

Conflicts:
	backend/app/views/spree/admin/stock_transfers/show.html.erb
Update aws-sdk and activemerchant to deal with nokogiri restrictions. Fixes #3625
Lets not run ci against sqlite3 to speed up travis builds by focusing on production databases.