ADD new parameter for do_search - go, that is passed when paging is involved (prev/next page or resource)
new hooks in do_search:
alternativeresults - allows to bypass searching
modifyfetchrows - allows to modifyfetch rows parameter
beforereturnresults - called before returning results

git-svn-id: http://svn.montala.net/svn/resourcespace@4916 c08608d7-6e46-0410-86ca-f2a6f1370df5