Tor 0.0.2pre15 prerelease is out

[Roger Dingledine <arma@mit.edu>]

This is mainly a bugfix release for clients. If pre14 works for you,
feel free to stick with it. But I find that pre15 works a lot better.

Note that 'make install' will clobber your torrc, so back it up if you've
changed it.

Improvements since 0.0.2pre14:

Robustness and bugfixes:
  - Sometimes clients would cache incorrect DNS resolves, which would
    really screw things up.
  - An OP that goes offline would slowly leak all its sockets and stop
    working.
  - A wide variety of bugfixes in exit node selection, exit policy
    handling, and processing pending streams when a new circuit is
    established.
  - Pick nodes for a path only from those the directory says are up
  - Choose randomly from all running dirservers, not always the first one
  - Increase allowed http header size for directory fetch.
  - Stop writing to stderr (if we're daemonized it will be closed).
  - Enable -g always, so cores will be more useful to me.
  - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.

Documentation:
  - Wrote a man page. It lists commonly used options.

Configuration:
  - Change default loglevel to warn.
  - Make PidFile default to null rather than littering in your CWD.
  - OnionRouter config option is now obsolete. Instead it just checks
    ORPort>0.
  - Moved to a single unified torrc file for both clients and servers.