JBIDE-18627 - Add a page with the list of all blog entries (without content)

Modified the blog title/tags/author image layout
Added a new /blog/all.html page
Added a banner on /blog, /blog/all.html and all generated tag pages (/blog/tag/release, etc.)
rename News to Posts and remove obsolete rakefile news date manipulation
fix last news to post
jazoon event
JBIDE-18629 - Show N&N for JBT 4.1.0.Final and 4.1.1.Final