v0.13.0.19: adds an option to set date when a product or variant becomes unavailable

Includes a few missing translations to czech, improves display of
unavailable items.

v0.13.0.18

adds an option to lock payments to user groups

v0.13.0.17: improves dashboard statistics

Fixes missing czech translation for statistics header. Improves clarity
of displayed information. Removes useless registration count. Adds data
for any paid orders.

v0.13.0.16

Merge branch 'master' of github.com:ThreeSixtyEu/Sylius

v0.13.0.15

datepicker format is dd.MM.yyyy

v0.13.0.14

Revert "all API checkouts with gateway 'dummy' will be automatically …

v0.13.0.13

all API checkouts with gateway 'dummy' will be automatically completed

v0.13.0.12: fixes API routes for product_variant actions

ProductVariant has no field "product" - it has "object". The "id"
criteria was useless since it is ignored by the API route controller
which takes the parameter directly.

(cherry picked from commit 9cb9edeae29f5be75da91482dd9029cddc22ce5b)

v0.13.0.11

MasterVariant now marks the whole product for promotion eligibility

v0.13.0.9

coupon usage limit eligibilityChecker fix