Some fixes in CVE-2014-8090 post

Typos, links, rewrap.
Small fixes in latest release announces (en)
Fix links in recent news posts (ja, zh_tw)
Translate news from 11/13 (es)
Translate for 2.1.5 released + fix small stuffs (vi)
Merge pull request #896 from thomastran/master

Translate for 2.1.5 released (vi)
Fix broken link in 2.1.5 post; rewrap (vi)
Small fix in CVE-2014-8090 post (en)
Translate latest news posts (de)
Merge pull request #894 from dabit/master

Translate release news from 11/13 (es)
Small fixes in 2014-11-13 posts (es)
Small fix in old news post
Fix post-info layout for 'Other News' on homepage

The 'post-info' CSS class is needed both for 'p' and 'span' elements.
Also introduce line breaks (previously achieved with 'display: block').
Clean up layout for 'Other News' on homepage

Remove legacy code left over from old two column layout.
Merge branch 'layout-of-other-news'
Translate latest news (pl)
Small fixes in latest news posts (pl)
Remove obsolete image files

Delete leftovers from long ago: book covers, ads, Rails and beta logos.
Remove files left over from Radiant CMS admin area

* images
* stylesheet
Move image files originating from old layout to own directory