handle missing PINNING variable when in single basket mode
add some tests when shop is pinned
https everything

[skip ci]
use correct file name for pinning spec
properly reset pinning after all pinning tests
properly redirect to assets + test
do not url escape fax number (fixes #16)
really reset pinning (actually implements a2d4267)
add some tests for custom fax settings
add tests regarding changed prices when editing an order
add fast path for insta-copying when order is very recent

The reason for not doing this all the time is that the price
might changed in between. The one hour limit is a trade off.
disable prefetch/prerender for new basket, since this modifies the cookies regardless of if the link is clicked
setup hipster pizza translation, translate start page
bump rails version
bump turbolinks
bump mechanize
bump uglifier
update prawn
update rails version
bump puma