Refactor to avoid direct dependency of vuze download manager in common
torrent package.
Refactor to avoid any vuze dependency inside the common torrent package.
Split 'common/' into commit 'b991afa7ddeef8f6ec267a9b86240f8722f1ce52'

git-subtree-dir: common
git-subtree-mainline: ce5ea38a318c4bb9b55beb5416d21a2f50032a89
git-subtree-split: b991afa7ddeef8f6ec267a9b86240f8722f1ce52