pull in Torrent.h/m from main Transmission project

- Comment out unused methods.
- Refactor to use internal dictionary rather than a struct.
update client to parse retrieved torrents

- Update UI to populate from Torrent instead of NSDictionary.
update Torrent public interface
update API later to support removal of torrents
pull in images and colors from main Transmission project
update display of torrents

- Add BPTorrentCell with BPProgressView as progress bar.
- Hookup torrent removal.
- Update UI after torrent pause/resume.
fix typo in README