Rename all apt-dht files to apt-p2p.
Rename project to apt-p2p.
Standardize the number of values retrieved from the DHT. Added the new RETRIEVE_VALUES configuration parameter. The desired number of values can now be negative, indicating that only the closest STORE_REDUNDANCY nodes are to be queried.
Refresh DHT values just before they are due to expire.
Move the key expiring to the checkpoint function.
Unload the AptPackages caches after a period of inactivity.
Return a token in find_node responses, use it in store_value requests. Also changed the checkpointing frequency to 5 minutes so that storing 3 old tokens will give an age of 10-15 minutes (as per protocol).
Initial debian directory and packaging related changes.