objects for review plugin
changes according to alec comments
ofr bug fixes
function documentation beautification
Merge pull request #182 from bozana/ofr

*8741* Add Objects For Review Plug-In
*8742* Check presence of article object
*8743* Remove old article_..._log tables
Merge pull request #183 from asmecher/8742-fix

*8742* Check article object before calling
Merge branch 'ojs-stable-2_4' of https://github.com/pkp/ojs into uls-install