update backend
Merge pull request #139 from sigal/master

update backend
update backend
update backend
update backend
update backend
Merge pull request #140 from sigal/master

bugtracker 0000084
Merge pull request #141 from sigal/stony-master

update backend
update admin RU language

translation
Merge pull request #142 from sk-plehanovec/master

update admin RU language
Merge pull request #143 from sigal/master

update backend/frontend
update backend
update backend
update backend
update backend
update backend
update backend
update backend
update backend
update backend