Merge pull request #1291 from jay-hodgson/develop

merge from release-66
Merge pull request #1292 from jay-hodgson/develop

merge from release-66
might work
blocked by PLFM-3092
ready
Merge pull request #1293 from john-hill/SWC-1816

ready
controller
update banners, and one of the project links
not working
Merge pull request #1303 from jay-hodgson/develop

merge from release-66 (fast forward)
update links to point to main challenge projects (per Chris)
Merge pull request #1304 from jay-hodgson/SWC-1882

Swc-1882: update challenge links and images
pre-build
code review change
Merge pull request #1305 from john-hill/SWC-1816-b

Swc 1816 b
add new link to front page for Collaboratorium
Merge pull request #1306 from jay-hodgson/release-66

SWC-1895: add new link to front page for Collaboratorium
Merge branch 'release-66' into develop
almost ready
reverted web.xml until Xa verifies it works on AWS