cmd_connect: import Connection from caesure.server, allow port specification.
args: -b/--base directory.
Merge branch 'update-2014' of github.com:samrushing/caesure into update-2014
Merge branch 'update-2014' of github.com:samrushing/caesure into update-2014
some utilities that use the utxo cache.
BlockDB: use G.args.base correctly.
cmd_version: XXX
stop trying to work without _script.pyx, it's confusing.
RecentBlocks:
  oldest -> root.
  fix save_state.
  use G.args.base.

__main__:
  argparse, etc...