Supports passing torrent as arguments

To use with the GUI from master or wip/savestate
merge master into wip/association
Supports association with magnets and torrent under linux.

Although adding via magnet seem broken for whatever reason...
TODO: remove >harmful system calls and check why the magnets aren't added.
Fixes magnet handling.

Now the multiple instances issue...
May fix build on clang; clang a shit
If your a shit and you know it, throw an error
Fully functional (I hope) torrents and magnets associations under GNU + Linux
Build should be fixed by updating clang
fucking ubuntu how does it werk
Merge pull request #70 from gtorrent/wip/association

Adds association with torrent and magnets under GNU + Linux