This file looks unused.
Remove now unused file.
Sort file names.
Add more missing files to the archive.
File looks unused too.  Remove it.
Improve message.
Disable bittorrent/parallel tests in release mode.

These tests are known to fail *sometimes*.  Define environment variable SG_EXENV to
"true", so that the tests fail consistently, and "make distcheck" succeeds.
Remove remaining trace of chord_before_dsend.
Add more missing files to the archive.
Add the HelloWorld example to the doc.
Sort file names.
Correclty distribute the lua/{bittorrent,kademlia} examples.
Don't know what this file is for.  Just delete it!.