Badges can be added in project page yaml

[#55621266]
Added simple template for easily creating twitter badges

[#55621266]
Reverted aggregator page to render projects in a grid of blocks
Update instructions for managing gh-pages
Fixed alignment on project aggregator [#55648828]
Polish margins on project page [#55731442]
made billboard height variable [#55278422]
Apply project badge icons [#55710298]
Merge branch 'gh-pages' of ../gh-pages into gh-pages
Generalize path to large project icon
Merge branch 'gh-pages' of ../gh-pages into gh-pages
Add Spring Data icon; begin adding sub-projects