Minor fixes (might have been done in the master already... heh -- yet to merge/CP
gr -- 1 more tiny fix to derivatives.rst
ENH: Provide compatibility anchors to redirect visitors following old URLs
fixing minor typo
ENH: minor -- just moved cachefiles into a separate rule
ENH: added quantal, and marked out EOL'ed Release entries

Probably it makes sense to mark out deprecated repositories in the list of Releases,
not among aliases
ENH: new section [release bases] to point to Debian and Ubuntu base repositories
Adjusting templates for suite->release change