re-add opera-devel, develop version of www/opera.
o update to 7.60 Preview-2 based on opera-devel port of 6 months ago,
which was just before removal.
o sync with www/opera as far as possible.
o pre-patch hack to minimize patch-search.ini.
o copy search.ini to locale/en/search.ini after patch, as they are
Approved by: Arjan van Leeuwen (who also maintains www/opera)