site settings option for preventing journal manager plugin management
fix missing $
Merge pull request #218 from bozana/pluginMngmnt

*8835* Site settings option for preventing journal manager plugin management
Relax certificate check for Travis build
*8841* /issue/current/showToc redirects to /issue/view/xx/showToc
*8790* Fix for DOAJ plugin publication dates
Merge pull request #240 from jmacgreg/ojs-stable-2_4

*8790* Fix for DOAJ plugin publication dates
*8852* Fixed default frequency time definition
Merge pull request #239 from lepidus/8841-fix

*8841* /issue/current/showToc redirects to /issue/view/xx/showToc
Merge branch 'ojs-stable-2_4' of https://github.com/pkp/ojs into uls-install
Merge branch 'uls-install' of ssh://github.com/ulsdevteam/ojs into uls-install