preallocating disk space, etc. Tweaked the cm <-> net api a bit.

* Move some struct and type definitions to net_types.h
* Fix ul_on_lost_peer. I must've been very tired when I wrote it :P

o Unhook cli_if.c from build temporarily. It needs to be fixed.
o Torrent meta data is now kept in subdirectories to $BTPD_HOME/library.
o Added some very incomplete life cycle logic for torrents.

and net_del_torrent does the opposite (surprise!).
* Some code shuffle has been done to separate net_ and dl_ from torrent_
  but there's still much to be done.
* Removed a couple of dead vars from struct torrent.

* Renamed the policy* files to upload* and download*.
* The upload (un)choker is now global instead of per torrent. The algorithm
  is not yet implemented however.
To be continued...

be shared by several peers. At least in end game.
* Link blocks with the peers we are loading them from and vice versa.
* Limit the number of requests / peer in end game too.
* Improve end game by using some sort of round robin for block requests.

so it must be bug free :)

policy on a lower level.

git-svn-id: file:///home/rnyberg/svngit/btpd/releases/0.1@1 76a1f634-46fa-0310-9943-bd1476092a85