[DOC] adjustment of the wiki pages

[Kristof Vansant]

Which one may be removed?:
https://www.ubuntulinux.org/wiki/HoaryReleaseSchedule or
https://www.ubuntulinux.org/wiki/HoaryHedgehogReleaseSchedule

Shouldn't https://www.ubuntulinux.org/wiki/GuideToHoary and
https://www.ubuntulinux.org/wiki/HoaryUpgradeNotes be merged? They seem
to be talking about the same thing :)
-- 
lupusBE (Kristof Vansant Belgium)