Instead of calling check_sid() from every single PHP script representing
a web page, add the call to aur.inc.php which is sourced by all of them.

Also, remove set_lang() calls from the scripts since these are also
already included in aur.inc.php.

Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>

Rename the project to help differentiate between the software providing
access to the Arch User Repository and the collection of source packages
itself.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>

This allows for having multiple co-maintainers for AUR packages.
Co-maintainers have push access to the package base Git repository but
are not allowed to change the package base category, disown the package
or modify the list of co-maintainers. The primary maintainer of an AUR
package can edit the list of co-maintainers from the Package Actions
box.

Implements FS#17911.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>