Transmission-rpc

Features
- **session**: add some dict style method like `.key()` and `.items()` ([111](https://github.com/Trim21/transmission-rpc/issues/111))

Features
- add `Session.items()`

Code Refactoring
- add kwargs types for `Client.add_torrent` ([108](https://github.com/Trim21/transmission-rpc/issues/108))

Bug Fixes
- disable proxy from environment variable

Bug Fixes
- **torrent**: `Torrent.date_active` for never activated torrent

Bug Fixes
- make sure `id` is always in `argumenets` ([95](https://github.com/Trim21/transmission-rpc/issues/95))

Bug Fixes
- raise `TransmissionAuthError` for 403 response ([81](https://github.com/Trim21/transmission-rpc/issues/81))

Features
- **torrent**: wrap `Torrent.status` to support simple comparison with attribute ([75](https://github.com/Trim21/transmission-rpc/issues/75))
- **torrent**: add `download_dir` property ([62](https://github.com/Trim21/transmission-rpc/issues/62))

Performance Improvements
- **client**: avoid load and dump HTTP query twice ([82](https://github.com/Trim21/transmission-rpc/issues/82))