JBIDE-16978 - Update main template from latest version of community theme (part 2)
JBIDE-16982 - Remove old blog entries, support for draft articles

Removed old blog entries
Added a banner on articles whose date is post today
Added a link to old blog at bottom of all /blog pages
Added a message on /blog to handle the case where there's no published article yet
JBIDE-16977 - Improve the style of the 'under development' banner

Reused colors (font and bg) from 'alert' elements of Bootstrap
Commented out unused parts (for the moment)
restore use of status codes instead of warning/danger/info
JBIDE-16657 - Handle case when cr == final in /downloads

Added a banner on the page with a link to the latest version download page
when there's a more recent version matching the current one (including 4.1.1.Final -> 4.1.2.Final)
Fixed typo: jQeury > jQuery
update switchyard feature content
JBIDE-17028 - Remove 'previous versions' from sidenav in /downloads
JBIDE-17006 - Migrate authors bio to asciidoctor
add switchyard editor details