ad 6.x-2.0-beta3

- ad.module
o simplify ad redirect path to avoid mismatched parameters
o feature #173176: use token module when generating notifications
- ad_cache.inc
o properly display $extra parameters
o simplify ad redirect path to avoid mismatched parameters
- ad_report.module
o bug #386794: generate proper report when selecting group(s)
- ad_channel.module
o add filter by premiere status to administrative ad overview page
- ad_notify.install
o feature #173176: new "roles" column to allow per-role notifications
- ad_notify.module
o feature #173176: add global per-role notifications, integrate token module
- ad_image.module
o bug #389724: properly display locally hosted images
o bug #391392: properly display locally hosted images
- ad_channel.module
o bug #389700: fix filtering by ad channel