Merge pull request #861 from takeit/v4.3

CS-5543 - Restore of backup from 4.2.4 is not working on 4.3
Merge pull request #863 from takeit/v4.3

documentation refactoring
Merge pull request #864 from takeit/v4.3

fixed links in docs for 4.3 branch
Merge pull request #865 from takeit/v4.3

BC -added siteinfo smarty variable to be accessible from every template
Still use (most stable) svn smarty version.
CS-5551: Plugin Manager Install/Update/Remove operations fail for some OSX installations
added ob_start() before ob_flush()
fix rendering admin dashboard for not logged in users
Merge branch 'v4.3' of https://github.com/sourcefabric/Newscoop into v4.3
update composer.lock file
Merge pull request #869 from thnkloud9/CS-5551

CS-5551: Plugin Manager Install/Update/Remove operations fail for some O...
fix knp_paginator versions
Merge branch 'v4.3' of https://github.com/sourcefabric/Newscoop into v4.3
Add hint for paginator (needed when entity have multiple id's).
remove not needed default data
fix article authors response
Release of new version 4.3.0
don't look for all plugins directories for translations
don't runn public resources listener on not api routes
port themes service to 4.3
turn off outSetIssue caching - wrong serialization