New featues and improvements.

### Highlights:

- Implemented this https://github.com/diantahoc/byteflood/issues/7.
- Auto updater
- Online torrent search results are now sortable.
- Performance improvements in this commit https://github.com/diantahoc/byteflood/commit/7eb74af149d749a4b7be15622cbcc25bde10db24.