fix problem with declaration of Rf_fork
Merge branch '17-fixes' into 18-new-news
new helpers module, fixing bug, other cleanup
year 2014 for helpers module
Merge branch '17-year-2014' into 18-new-news
Merge branch '17-fixes' into 18-new-news
update release date in NEWS
typo in doc
Merge branch '17-fixes' into 18-new-news