Merge pull request #186 from beghelli/ojs-stable-2_4

Retrieving URL components bug fix
Submodule changes track
*8754* Avoid non existing articles
Merge pull request #189 from beghelli/8754-fix

8754 fix review reminder task
*8688* Changes in test database to run statistics processing integration tests
*8688* Add statistics processing tests
*8688* Avoid file permission problems
*8253* Introduced SciELO plugin
*8253* Introduced token setting, fixed article galley stats recording, removed issue galleys
Adapting SciELO to the new api changes
to amend with Scielo plugin commit
Fixed strtotime bug with incomplete dates
get code from beghelli instead of pkp
travis changes