CS-5526: Adds requirement for specific smarty version
CS-5526: Adds composer.lock for new smarty version
Merge remote-tracking branch 'upstream/v4.3' into CS-5526
CS-5526: Adds composer.lock for new smarty version with dev dependencies
Merge pull request #851 from takeit/v4.3

CS-5529 - Problem with sr@latin
Merge pull request #837 from m038/CS-5526_v4.3

CS-5526: Adds requirement for specific smarty version
Merge branch 'v4.3' of https://github.com/sourcefabric/Newscoop into v4.3
Workaround lack of support for @ character in locales
Add correct codes for Serbia