changed: Move job type definitions into job.h
changed: Implement methods to pause/unpause the job queue for a certain priority
changed: Remove image job pause/unpause from OMX/AML player as that's now handled by CApp
changed: Implement method for checking whether a certain priority is processing
changed: Run SaveFileState job with priority normal to make sure it doesn't get paused
changed: No longer need to pause/unpause mediaflag jobs as that's now handled elsewhere