added rule extensions to support starting and stopping downloads assigned to a tag

git-svn-id: http://svn.vuze.com/public/client/trunk@40268 c2c1b7af-1477-405b-86ee-8aefd1fc4dd2
remove dups

git-svn-id: http://svn.vuze.com/public/client/trunk@40269 c2c1b7af-1477-405b-86ee-8aefd1fc4dd2
Update from Havokdan

git-svn-id: http://svn.vuze.com/public/client/trunk@40270 c2c1b7af-1477-405b-86ee-8aefd1fc4dd2
allow torrents to be stopped when we're not starting any new seeds due to up-limit rule being met

git-svn-id: http://svn.vuze.com/public/client/trunk@40271 c2c1b7af-1477-405b-86ee-8aefd1fc4dd2
Update from Repris d'injustice

git-svn-id: http://svn.vuze.com/public/client/trunk@40273 c2c1b7af-1477-405b-86ee-8aefd1fc4dd2