Not changing vuze speed tester.
Error fix and refactor in vuze configuration and download creation.
Split 'common/' into commit 'c336664eb83232e2fb9571192e6451b19fdfbd50'

git-subtree-dir: common
git-subtree-mainline: 25c25bac1ce6fb59d58747f29a72ad0ad7a74b72
git-subtree-split: c336664eb83232e2fb9571192e6451b19fdfbd50