_layouts/news.html: fix markup

No p element in scope but a p end tag seen.
The acronym element is obsolete. Use the abbr element instead
Bad value Mongrel for attribute lang on element a

and this url is not valid anymore, rubyforge.org is down
Fix value ”text/ruby” for attribute type on element script
The frameborder attribute on the iframe element is obsolete
Bad value 1 for attribute border on element img

This photo is currently unavailable
Attribute caps not allowed on element a at this point
Element nomarkdown not allowed as child of element div
Urls fixes
Element phave not allowed
Bad value http:/www.sdforum.org for attribute href on element a

This seems obsolete...
The tt element is obsolete. Using kbd instead
The align attribute on the p element is obsolete
Fix italian ruby-1-9-2-p136-is-released post
Fix rubygarden url for Bulgarian
Update form for portuguese google group
Merge pull request #832 from spk/markup_fixes

Markup fixes