PkgID
UserID
This implements emailing comment notifications, including a user option to
enable/disable it on the package page. It uses php's mail() function to do
it and sends to everyone on the notify list as BCC.
This needs some more testing before public consumption.
new doc page added
changed AUR to community
lower-cased unsupported
fixed half of the bug with changing categories:
categories now can't be changed for packages in community
however they can still be changed out from under maintainers by joe users for unsupported packages
debugged problem with package details not found when unsupported uploads were with Category 0 (changed default to 19)
