Merge branch 'release-3.1.8'
Merge branch 'develop'
Merge branch 'release-3.1.10'
Merge branch 'release-3.1.11'
Twitter 301 change, again.
Remove 2006 grid.

It lasted 7 years, pretty impressive in today's world.
Merge pull request #423 from smeranda/redirection

Another Twitter 301 fix.
Merge pull request #424 from smeranda/remove_old_grid

Remove 2006 grid.
Revert "Merge pull request #424 from smeranda/remove_old_grid"

This reverts commit 472d4f86b19e2a9796b02224d2b085b24b143f55, reversing
changes made to ee2f01c9e62e3fae7e8adac028a5fd8e326170c9.