Lots of fixes.
Donations status switching refactored.
Added donations logging class, but it needs further works.
Merge branch 'master' into remote-master
Task 441 is ready for testing.
Merge branch 'master' into remote-master
Merge pull request #1 from HZ-labs/master

New design applyed to the donation forms.
Task 415 is ready for testing.
Removed unnecessary code.
Currency -> USD fix in Paypal plugin.
Task 454 is ready for testing.
Fixes on task 463 and ajax payments statuses updates.
Removed icons of S and M sizes (incl. options).
Merge branch 'master' into anatoly-master

Conflicts:
	leyka/includes/frontend-single-donations.php
Added changes in the checkout forms makeup.
Added some new translation lines.
Task 360 is ready for makeup.
Minor fixes. Tasks: 454, 524, 360, 531.
Added rus. translations for new localization lines.
Task 534 is finished for Bank order and Yandex gateways.
Task 534 is finished.
Further refactoring in the Bank order gateway.
Important fix in Yandex.money gateway.
Added new l10n lines for gateways.
Important bugfix - now Leyka default styles are applying correctly.
Important fix on Bank order gateway - task 544 is ready for testing.