Revert "Remove articles which are now on exciting.io."

This reverts commit 8ce4bcad22a3f7c63ae90127ced78c78166bfa56.

I'm reverting this because there are more things we should remove for each
project e.g. CSS, assets, etc. Also we should think about whether we want
to keep some info on our site about the projects that have moved to
exciting.io.
Revert "Fix broken home page."

This reverts commit f0d1f47ba9455db5b23766d1f97facad6ad9aa51.

I'm reverting this, because I've reverted the commit [1] which made this
one necessary.

[1] 8ce4bcad22a3f7c63ae90127ced78c78166bfa56