Package Kit: Fix -Wmismatched-tags

Replace class with struct, since BJobStateListener is previously declared
as a struct in Job.h
Pointed by clang [-Wmismatched-tags]

Change-Id: I75293b48bcb521d25e98702d1fc1e0ab1008d504
Reviewed-on: https://review.haiku-os.org/482
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

Moved BJob, and JobQueue into the support kit.

* Put it in the BSupportKit namespace, following the style introduced
with the package kit for now.
* The BSupportKit::BJob class no longer knows about the package kit's
Context class. However, the BPackageKit::BJob class does.
* Due to the namespace juggling, a lot of files had to be touched.
* The JobQueue class remains private.
* Due to the way Haiku is built on itself, you cannot build this change
under Haiku with an older release.

BDecisionProvider: Make YesNoDecisionNeeded() non-abstract.

- A subset of jobs that require a BContext don't in fact make use of the
decision provider. As such, make the default implementation usable for
those cases so one doesn't need to always create a dummy derived class.

Mostly style-related changes to package kit:
* drop 'Haiku' namespace
* rename 'Package' namespace to 'BPackageKit'
* renamed all public classes to begin with a 'B'
* renamed BPackageKit::Roster to BPackageKit::BPackageRoster to not
clash with the BRoster from the application kit.
* fix some instances of public headers including private ones

Some functional changes, too:
* JobQueue now removes and deletes dependants of failed jobs
automatically
* JobQueue supports waiting for jobs to become runnable
* added a couple of InitCheck() methods where they make sense
and invoke those in users of these classes



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40287 a95241bf-73f2-0310-859d-f6bbb57e9c96

* more work on the package kit, repositories can now be added and
refreshed


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40280 a95241bf-73f2-0310-859d-f6bbb57e9c96

* added support for interactive decisions to package kit and pkgman


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40268 a95241bf-73f2-0310-859d-f6bbb57e9c96

* WIP-commit of the first parts of the package kit and the pkgman
(console-)tool


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40261 a95241bf-73f2-0310-859d-f6bbb57e9c96

Moved BJob, and JobQueue into the support kit.

* Put it in the BSupportKit namespace, following the style introduced
with the package kit for now.
* The BSupportKit::BJob class no longer knows about the package kit's
Context class. However, the BPackageKit::BJob class does.
* Due to the namespace juggling, a lot of files had to be touched.
* The JobQueue class remains private.
* Due to the way Haiku is built on itself, you cannot build this change
under Haiku with an older release.

BDecisionProvider: Make YesNoDecisionNeeded() non-abstract.

- A subset of jobs that require a BContext don't in fact make use of the
decision provider. As such, make the default implementation usable for
those cases so one doesn't need to always create a dummy derived class.

Mostly style-related changes to package kit:
* drop 'Haiku' namespace
* rename 'Package' namespace to 'BPackageKit'
* renamed all public classes to begin with a 'B'
* renamed BPackageKit::Roster to BPackageKit::BPackageRoster to not
clash with the BRoster from the application kit.
* fix some instances of public headers including private ones

Some functional changes, too:
* JobQueue now removes and deletes dependants of failed jobs
automatically
* JobQueue supports waiting for jobs to become runnable
* added a couple of InitCheck() methods where they make sense
and invoke those in users of these classes



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40287 a95241bf-73f2-0310-859d-f6bbb57e9c96

* more work on the package kit, repositories can now be added and
refreshed


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40280 a95241bf-73f2-0310-859d-f6bbb57e9c96

* added support for interactive decisions to package kit and pkgman


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40268 a95241bf-73f2-0310-859d-f6bbb57e9c96

* WIP-commit of the first parts of the package kit and the pkgman
(console-)tool


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40261 a95241bf-73f2-0310-859d-f6bbb57e9c96