Revert r114067, r114071, r114075, r114079, r114081, r114082, r114084, r114086, r11408...

Revert r114067, r114071, r114075, r114079, r114081, r114082, r114084, r114086, r114088, r114089, r114101, r114118, r114137, r114147, r114164, r114172, r114175, r114180, r114208, r114209, r114215, r114219, r114226, r114321, r114322.

This reverts the SpecialCachedPage and formatDuration sagas, with some collateral damage here and there. All of these revisions are tagged with 'gerritmigration' and will be resubmitted into Gerrit after the Gerrit switchover. See also http://lists.wikimedia.org/pipermail/wikitech-l/2012-March/059124.html