JBIDE-16843 - Restore /documentation/whatsnew (drop the '_') and get individual pages generated

Fixed missing pages on sidenavbar
Reduced number of versions labelled with "Stable" / "Development" / "Nightly", shared code
between "Downloads" and "Whatsnew" parts.
Added multiple versions on /documentation/whatsnew
Moved remaining article from /documentation/_whatsnew to /documentation/whatsnew
JBIDE-16780 : Maven New and Noteworthy for 4.2.0.Beta1

Signed-off-by: Fred Bricon <fbricon@gmail.com>
JBIDE-16778 N&N for CDI
move into proper whatsnew location
JBIDE-16770 jst/jsf New and Noteworthy for 4.2.0.Beta1
move into proper whatsnew location
JBIDE-16784 Usage Analytics New and Noteworthy for 4.2.0.Beta1
move into proper whatsnew location
move into proper whatsnew location and fix a few grammar erros and content.
wrote OpenShift N&N 2.6.0.Beta1
Fix grammar/content and stop using 'import' where it 'use existing'
JBIDE-16785: Forge New and Noteworthy for 4.2.0.Beta1
JBIDE-16785 reordered sequence to put biggest news first.
Enable error checking for pullrequests.
JBIDE-16776 - Webservices and Rest New and Noteworthy for 4.2.0.Beta1
JBIDE-16712 - categorize feature list into JBT vs. JBTIS features
aerogear 4.2.0 Beta1 new and noteworthy
JBIDE-16922 - Improve /documentation layout

Also fixed the button styles on /community
Merge branch 'xcoulon-JBIDE-16922'
JBIDE-16785: Forge N&N, include the connection profile news