Remove all Python 2 support

* Removed all __future__ imports from code
* Removed all six dependencies
* Removed all future_builtins imports
* Removed all Python 2 related code

Closes: deluge-torrent#325

Deluge 2.0.5 Release

Deluge 2.0.4 Release

Deluge 2.0.3 Release�[D

Deluge 2.0.2 Release

Deluge 2.0.1 Release

Deluge 2.0.0 Release

Save copies of torrent files from magnet links.

This patch is meant for 1.3-stable (1.3.15 as of the commit date).

The bug is: when you add a new magnet link to download, even if you tick
the option *Copy of .torrent files to:*, deluge still fails to save a
copy of torrent. This patch adds extra code to do so.

Deluge 2.0 Beta 1

Deluge 2.0 Beta 1