Revert "Avoid namespace pollution, add comments"

This reverts commit 06912a2dcef639a0329e1151bbf083c6acb1ec62.
Revert "Use custom redirector for external links"

This reverts commit d1166330d7c94a5c1b5b32b628e1fb201443e054.
Revert "Add custom redirector to clear referers"

This reverts commit 0d6339c8a41af53bd21f8a7bf3e7e1114b53e2e4.
Revert "More external links"

This reverts commit b5bbe3050034465e88d399602abed5151f94cb2c.
Revert "Revert "remove direct links to external sites from source templates, fixes #195""

This reverts commit 34b8205308d0b7795dcd5d24c642e10e2060aa42.
Merge pull request #516 from diracdeltas/fix/issue-453

Fix #453